Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7111253 | Method and apparatus for displaying hierarchical information A method of visualizing and exploring tree structures whose interior nodes represent substantial amounts of logically related textual information. The method includes methods for partitioning tree-structured textual material into topically related clusters of adjace... | 09/19/2006 |
| 7107550 | Method and apparatus for segmenting hierarchical information for display purposes A method for pre-segmenting a large tree or treetable for purposes of visualization and deeper exploration of individual nodes, with the segments sized so as to allow inclusion of at least some amount of content-indicative text for each node. This invention pre-part... | 09/12/2006 |
| 7031970 | Method and apparatus for generating summary information for hierarchically related information A method is provided for digesting the content of hierarchically related information. The method chooses a set of extracted sentences representing a proportion of the text associated with a subtopic, by a combination of features resting on inherent properties of the... | 04/18/2006 |
| 7007069 | Method and apparatus for clustering hierarchically related information A method for partitioning a tree-structured discussion or other tree structured collections of texts into clusters dealing with identifiable subtopics, if such subtopics exist, or into manageable partitions if not. Each document is represented by a vector and is ini... | 02/28/2006 |
| 6987348 | Piezoelectric transducers A system and method of operation for a piezoelectric transducer is described which utilizes a mesa structure interposed between a piezoelectric material element and a chamber diaphragm. The system can be used as a sensor where a net motion to the diaphragm causes a ... | 01/17/2006 |
| 6976212 | Method and apparatus for the construction and use of table-like visualizations of hierarchic material A method for the conversion and display of tree-structured information to a “treetable”, a table-like display structure, in which each path from a root to a leaf node is represented by a single column, and cells representing the immediate successors of a node ar... | 12/13/2005 |
| 6967431 | Piezoelectric transducers and methods of manufacture A system and method of operation for a piezoelectric transducer is described which utilizes a mesa structure interposed between a piezoelectric material element and a chamber diaphragm. The mesa structure may further comprise a series of mesa openings at least parti... | 11/22/2005 |
| 6944818 | Method and apparatus for the viewing and exploration of the content of hierarchical information A method for the conversion and display of tree-structured information to a “treetable”, a table-like display structure, in which each path from a root to a leaf node is represented by a single column, and cells representing the immediate successors of a node ar... | 09/13/2005 |
| 6924584 | Piezoelectric transducers utilizing sub-diaphragms A system and method of operation is described which utilizes an array of piezoelectric actuators distributed over the surface of a diaphragm. In one embodiment, the piezoelectric actuator array is used to cause a net motion of the diaphragm equal to the sum of the m... | 08/02/2005 |
| 6812509 | Organic ferroelectric memory cells This invention proposes to make memory using organic materials. The basic structure of the memory cell is a field effect organic transistor using a ferroelectric thin film polymer as gate dielectric. By controlling the gate voltage to polarize the thin film ferroele... | 11/02/2004 |
| 6573880 | Applications for electronic reusable paper A system for displaying information which comprises a substrate and a conformable display media and control logic associated with the substrate. The display media has an input for receiving display information and the control logic provides display inform... | 06/03/2003 |
| 6507333 | Tribo-addressed and tribo-supperessed electric paper A display is provided with an insulative layer with electrical properties which have been selected so that the display can be addressed with a stylus and which minimizes the effects of stray triboelectrically generated charges. Also provided is a method o... | 01/14/2003 |
| 6497942 | Twisting-cylinder display A gyricon or twisting-particle display based on nonspheroidal (e.g., substantially cylindrical) optically anisotropic particles disposed in a substrate. The particles can be either bichromal or polychromal cylinders, preferably aligned parallel to one ano... | 12/24/2002 |
| 6492967 | Fabrication of a twisting ball display having two or more different kinds of balls A method of making a substrate in which sets of optically anisotropic spheroidal balls are disposed, as for use in an electrical twisting ball display. First and second sets of spheroidal balls, are deposited on a receiving surface composed of an elastome... | 12/10/2002 |
| 6485280 | Methods and apparatus for fabricating bichromal elements An apparatus for fabricating bichromal elements comprising a separator member having a central rotating point, the separator member having first and second spaced apart, opposed surfaces with an edge region in contact with both of said opposed surfaces. T... | 11/26/2002 |
| 6486861 | Method and apparatus for a display producing a fixed set of images A method to greatly simplify and reduce the cost of displays when all of the images that need to be displayed are known beforehand. By precomputing the intersections of the images and addressing the intersections of the images, the number of drivers that ... | 11/26/2002 |
| 6456272 | Field addressed displays using charge discharging in conjunction with charge retaining island structures The invention is an electric reusable paper sheet that uses a pattern of conductive charge-retaining islands on the outward-facing side of the first of two thin layers used to encapsulate a Electric reusable paper substrate which interact with conductive ... | 09/24/2002 |
| 6428868 | Twisting-cylinder display A gyricon or twisting-particle display based on nonspheroidal (e.g., substantially cylindrical) optically anisotropic particles disposed in a substrate. The particles can be either bichromal or polychromal cylinders, preferably aligned parallel to one ano... | 08/06/2002 |
| 6350405 | Apparatus for manufacturing three dimensional parts using an inert gas A method for manufacturing metal structures in which minute drops of a liquid metal are emitted from an acoustic device through an inert gas. The presence of the inert gas at the surface of the liquid metal prevent the formation of an oxide skin which wou... | 02/26/2002 |
| 6302524 | Liquid level control in an acoustic droplet emitter An acoustic droplet emitter which a liquid level control plate has a lip in intimate contact with the free surface of a liquid is constructed. The liquid level control plate also has an effective aperture diameter at the exit edge of the plate which is la... | 10/16/2001 |
| 6283580 | Method of operation of an acoustic ink jet droplet emitter utilizing high liquid flow rates A method of operation of an acoustic droplet emitter with an array of droplet emitting utilizing high liquid flow rates. The higher flow rates prevent excess heat absorption during the droplet emission process and allow for excess heat generated by contro... | 09/04/2001 |
| 6262707 | Gyricon displays utilizing magnetic addressing and latching mechanism A rotating element for use in an electric paper system in which the rotating element may be either substantially cylindrical or substantially spherical in shape and comprises at least three portions. Each portion has an associated optical modulation chara... | 07/17/2001 |
| 6251329 | Method of making a gyricon display using magnetic latching A method of making rotating element sheet material utilizing magnetic latching is disclosed. First a plurality of rotating elements having a magnetized segment are mixed with magnetic particles to attract the magnetic particles to the magnetized segments.... | 06/26/2001 |
| 6248151 | Method of manufacturing three dimensional parts using an inert gas A method for manufacturing metal structures in which minute drops of a liquid metal are emitted from an acoustic device through an inert gas. The presence of the inert gas at the surface of the liquid metal prevent the formation of an oxide skin which wou... | 06/19/2001 |
| 6222513 | Charge retention islands for electric paper and applications thereof The invention is an electric paper sheet that uses a pattern of conductive charge-retaining islands on the outward-facing side of the first of two thin layers used to encapsulate a Gyricon sheet. The second encapsulating layer may also coated with a condu... | 04/24/2001 |
| 6211998 | Magnetic unlatching and addressing of a gyricon display A method of addressing a sheet of a rotating element sheet material that has a reduced applied electric field requirement when a gyricon sheet using magnetic trapping is disclosed. A magnetic trapping gyricon sheet comprises a substrate with a plurality o... | 04/03/2001 |
| 6199970 | Acoustic ink jet printhead design and method of operation utilizing ink cross-flow A droplet emitter with an array of droplet emitting devices constructed such that a flowing liquid used create the droplets can flow through the droplet emitter at higher flow rates. The higher flow rates prevent excess heat absorption during the droplet ... | 03/13/2001 |
| 6197228 | Method of making a gyricon display using magnetic latching A method of making rotating element sheet material utilizing magnetic latching is disclosed. First a plurality of rotating elements, each element having a magnetized segment, are mixed with an elastomer and a plurality of magnetic particles to attract the... | 03/06/2001 |
| 6174153 | Apparatus for making uniformly magnetized elements for a gyricon display An apparatus for forming magnetized rotating elements for a rotating element display where all the elements are magnetized in the same orientation is disclosed. The apparatus comprises at least one separator member. Each separator member has a diameter, t... | 01/16/2001 |
| 6162321 | Method for making additive color electric paper without registration or alignment of individual elements Several variations in full-color additive gyricons are shown. Each gyricon shown has been designed for ease of construction by eliminating the need for precise placement of rotating elements, alignment between the gyricon layers, if any, and alignment bet... | 12/19/2000 |
| 6160606 | Optical equivalents of fiber optic face plates using irradiation sensitive glass Optical plates which have columnar features approximately in the direction of light propagation which are capable of total internal reflection, a controllable numeric aperture (NA) at input and output surfaces, rotational azimuthal averaging and translati... | 12/12/2000 |
| 6154236 | Acoustic ink jet printhead design and method of operation utilizing flowing coolant and an emission fluid A droplet emitter with an array of droplet emitting devices constructed such that one flowing liquid is used to create the droplets while a second low acoustic impedance liquid can be used to both make the transfer of acoustic energy to the first liquid m... | 11/28/2000 |
| 6147791 | Gyricon displays utilizing rotating elements and magnetic latching A sheet material for use in a gyricon display in which a rotatable element, which has a portion which is capable of being permanently magnetized may be oriented to experience an attractive force between itself and a soft magnetic material pad. The attract... | 11/14/2000 |
| 6134291 | Acoustic ink jet printhead design and method of operation utilizing flowing coolant and an emission fluid A droplet emitter with an array of droplet emitting devices constructed such that one flowing liquid is used to create the droplets while a second low acoustic impedance liquid can be used to both make the transfer of acoustic energy to the first liquid m... | 10/17/2000 |
| 6128124 | Additive color electric paper without registration or alignment of individual elements Several variations in full-color additive gyricons are shown. Each gyricon shown has been designed for ease of construction by eliminating the need for precise placement of rotating elements, alignment between the gyricon layers, if any, and alignment bet... | 10/03/2000 |
| 6122094 | Additive color electric paper without registration or alignment of individual elements Several variations in full-color additive gyricons are shown. Each gyricon shown has been designed for ease of construction by eliminating the need for precise placement of rotating elements, alignment between the gyricon layers, if any, and alignment bet... | 09/19/2000 |
| 6110538 | Method of making a gyricon display using magnetic latching A method of making rotating element sheet material utilizing magnetic latching is provided. The first step is providing a sheet of sheet material comprising a substrate with a surface and rotatable elements disposed therein. The elements each have an opti... | 08/29/2000 |
| 6097531 | Method of making uniformly magnetized elements for a gyricon display A method of forming magnetized rotating elements for a rotating element display where all the elements are magnetized in the same orientation is provided. First, at least two planar streams of hardenable liquids flowing in substantially the same direction... | 08/01/2000 |
| 6038059 | Additive color electric paper without registration or alignment of individual elements Several variations in full-color additive gyricons are shown. Each gyricon shown has been designed for ease of construction by eliminating the need for precise placement of rotating elements, alignment between the gyricon layers, if any, and alignment bet... | 03/14/2000 |
| 6019814 | Method of manufacturing 3D parts using a sacrificial material A method for manufacturing precise complex three dimensional structures in which minute drops of both a product layer and a sacrificial layer are emitted from an acoustic device. The process is a two step process wherein first the three dimensional struct... | 02/01/2000 |
