"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4979350 | Device for the screwing in and the screwing out of screw caps etc. into or out of the filler necks of barrels, containers, etc. A device for applying and removing threaded caps to and from threaded filler necks of containers includes a centering device, a rotatable grasping member mounted within the centering device for grasping a cap and turning the cap to thread it relative to t... | 12/25/1990 |
| 4956595 | Driving circuit for a five-phase stepping motor A driving circuit for a five-phase stepping motor includes five phase-windings each having a starting end and a terminating end in which each of the starting ends is successively connected to each of the terminating ends to form a ring, pairs of switching... | 09/11/1990 |
| 4932872 | Method for fabricating X-ray masks In the disclosed method, an X-ray mask is made by forming a semiconductor wafer having a first coefficient of expansion, doping a surface of the wafer, metallizing the wafer, metallizing a washer shaped ring having a lower coefficient of expansion, bondin... | 06/12/1990 |
| 4932018 | Integrated circuit for generating indexing data in a CD player An integrated circuit for a CD player includes an EFM decoder which converts an EFM signal inputted from a compact disc into symbols. Subcode data which includes first, second and third areas is outputted from the EFM decoder and stored in a first shift r... | 06/05/1990 |
| 4922827 | Method and means for intercepting missiles A ballistic missile about to re-enter the atmosphere is destroyed by explosively dispersing for large quantities of inherently-light C60 molecules in clouds in the path of the missile. The sharp edges of the molecules scar the missile and subje... | 05/08/1990 |
| 4916824 | Method for measuring roll profile and apparatus therefor The disclosed method and apparatus measures radial deviations along the axial length of a work roll with a number of axially spaced displacement detectors and at least three axially spaced motion detectors mounted ona detector mount that moves axially alo... | 04/17/1990 |
| 4912793 | Dry cleaning method and apparatus There are disclosed a dry cleaning method and apparatus using organic solvents in which two types of solvents melted to each other, one of which is a solvent (for example, perchloroethylene or 1.1.1 trichloroethane) having large washing power and the othe... | 04/03/1990 |
| 4908990 | Lumber door and method for manufacturing thereof A lumber door and manufacturing method thereof which is constructed by perforating the plurality of the pipe inserting holes at each of the unit lumbers in the direction of transverse and thickness with the predetermined diameter, depth and location, inse... | 03/20/1990 |
| 4903134 | Automatic focusing circuit for automatically matching focus in response to video signal and zoom position In an automatic focusing circuit of a video camera, automatic focusing operation is performed by a focus evaluating value formed in response to a video signal obtained by an image sensing circuit (4). A first focusing motor control circuit (15) controls t... | 02/20/1990 |
| 4902248 | Adaptors A connector backshell adaptor comprises a body portion (1) and a rotatable coupling nut (2) at one end. The body portion is provided with annular flanges (5,6), a sheathing (7) being clamped in the zone (4) between the flanges by means of at least one ste... | 02/20/1990 |
| 4901318 | Address generating circuit An address generating circuit (13) generates a reading address for reading a buffer memory (16) so that so-called P and Q codes for a CD-ROM which have parameters i and j can be decoded. The reading address is obtainable based on a formula RDA=H+2L+p, whe... | 02/13/1990 |
| 4891530 | Testing or inspecting apparatus and method for detecting differently shaped surfaces of objects In a testing or inspecting apparatus for the detection of objects, which have differently formed surfaces and are moved relative to the testing apparatus, the object (12) to be tested is illuminated in a plane at right angles to the main movement directio... | 01/02/1990 |
| 4882570 | Vehicle and distress indicator therefor A foot switch operated by a driver of a vehicle such as a taxicab actuates a circuit which disables the indicating lamps in the taxi's roof light and energizes distress signaling lamps in the roof light so that it flashes on and off. The flashing roof lig... | 11/21/1989 |
| 4876140 | Laminate conducting plastic A layer of conductive plastic material can be made to exhibit relatively high conductivity with a relatively small amount of electrically conducting particles included in it if the layer is extruded in a lamellate form. Particularly, sublayers having thic... | 10/24/1989 |
| 4864751 | Telephone index The telephone index has a plurality of selection keys and a spring-operated drawer witha stack of index cards, which is held in the index housing by means of a locking device in such a way that on operating a selection key the drawer locking means is rele... | 09/12/1989 |
| 4864717 | Method of making a digital magnetic head structure A method for fabricating a write-after-read magnetic head assembly employs rectangular wafers sliced from a block of abrasion-resistive material. The block is prepared, prior to slicing, with pairs of opposed slots extending inwardly from anterior and pos... | 09/12/1989 |
| 4864583 | Gas lasers with reduced turn-on delay The turn-on delay of a gas laser is significantly reduced by creating a region of higher electric field intensity between the plasma discharge-confining region of the laser and the laser anode. This is accomplished by creating one or more regions of highe... | 09/05/1989 |
| 4864264 | Bistable toggling indicator In the disclosed device, a pair of magnets supported in the ends of a C-shaped yoke bias an armature into one of the two rotary positions. A short pulse to a coil about the center of the yoke induces a short term magnetic field that supplements the polari... | 09/05/1989 |
| 4857425 | Manufacture of integrated circuits using holographic techniques A method of manufacturing integrated circuits using holographic techniques by interference between an input beam and a reference beam generated from laser sources. A holographic image of the object formed on a mask window, is formed on recording emulsion ... | 08/15/1989 |
| 4846857 | Electric dust collector with electrode supporter therefor In a dust collector, reverse U-shaped or reverse V-shaped supports pass through reverse U-shape or reverse V-shaped passages located above a dust collecting chamber. One end of each support passes below the passages and suspends electrodes in the dust col... | 07/11/1989 |
| 4843220 | Automatic data capture for multiple form point of sale slip packs An automatic data collection system for recording transaction data from a point of sale terminal employs a magnetic stripe on the back of the bank copy of the familiar sales slip pack. In response to the receipt of a credit authorization number, the POS t... | 06/27/1989 |
| 4841142 | Document scanner with resolution selection control A resolution-select arrangement is provided for a fiber optic document scanner (or scope) having its exit field coupled to an array of discrete sensors. An initialization procedure provides an address string which associates at least one address of the se... | 06/20/1989 |
| 4840623 | Medical catheter with splined internal wall Medical catheters with splined internal walls are disclosed as having sufficient rigidity to transmit torque from the proximal end to the distal end even over the long distances required for angioplast procedures. The splined geometry obviates the need fo... | 06/20/1989 |
| 4830446 | Production initializer for fiber optic document scanner A production initializer for a plurality of document scanners each comprising a fiber optic subassembly and a discrete sensor array is provided by moving a spinning light beam along an axis and positioning the linear entrance field of each of a plurality ... | 05/16/1989 |
| 4827164 | Magnetically assisted stepping motor A stepping motor with toothed stator poles and toothed rotor poles is magnetically enhanced by locating permanently magnetized inserts in the spaces between the stator teeth and magnetizing the inserts transverse to the direction of movement of the rotor ... | 05/02/1989 |
| 4824418 | Articulated joint between two shafts Articulated joint comprising a cylindrical hollow drive element (2) and a spherical drive element (5) at the end of in each case one shaft (1,2), in which the hollow drive element (2) is roughly shaped like a hollow cylinder with a wavy inner profiling an... | 04/25/1989 |
| 4821783 | Apparatus for filling containers to be sealed with plugs In the disclosed apparatus, a belt feeds empty containers, into a filling station. At a waiting position in the station of the belt lifts a container with a support having centering rollers that permit horizontal displacement of the empty container while ... | 04/18/1989 |
| 4812646 | Optical fiber initialization method and apparatus A noncoherent fiber optic bundle is made coherent by relating the positions of fiber ends in the exit field to the consecutive positions of an initialization beam of light moving in the entrance field. The initialization beam is small compared to the fibe... | 03/14/1989 |
| 4804024 | Apparatus for filling containers with a flowable medium In the fill apparatus, a container feed belt with a lifting frame at the entry end includes container supporting and centering pulleys for displacing the empty container in the horizontal direction by means of alignment pulleys engaging the container rim ... | 02/14/1989 |
| 4799002 | Method of driving a five-phase stepping motor A five-phase stepping motor system includes phase windings connected in series with each other to form a ring and pairs of switching devices connected in series with each other, with each pair having an intermediate connection connected to a corresponding... | 01/17/1989 |
| 4798812 | Method for liquid phase epitaxial growth A method of fabricating a solid state device having chemically bound arsenic and phosphorous includes carrying out liquid phase epitaxial growth in the presence of partial pressures of arsenic and phosphorus.... | 01/17/1989 |
| 4797767 | Digital magnetic head structure A method for fabricating a write-after-read magnetic head assembly employs rectangular wafers sliced from a block of abrasion-resistive material. The block is prepared, prior to slicing, with pairs of opposed slots extending inwardly from anterior and pos... | 01/10/1989 |
| 4718428 | Method for determining diastolic arterial blood pressure in a subject Apparatus and related methods for continuous long-term non-invasive measurement of the pressure of a pulsatile fluid flowing through a flexible tube, particularly human arterial blood flow, is disclosed. Specifically, the apparatus provides a continuous c... | 01/12/1988 |
| 4718427 | Method for determining systolic arterial blood pressure in a subject Apparatus and related methods for continuous long-term non-invasive measurement of the pressure of a pulsatile fluid flowing through a flexible tube, particularly human arterial blood flow, is disclosed. Specifically, the apparatus provides a continuous c... | 01/12/1988 |
| 4718426 | Method for determining diastolic arterial blood pressure in a subject Apparatus and related methods for continuous long-term non-invasive measurement of the pressure of a pulsatile fluid flowing through a flexible tube, particularly human arterial blood flow, is disclosed. Specifically, the apparatus provides a continuous c... | 01/12/1988 |
| 4714929 | Digital averaging filter particularly suited for use with air navigation receivers Apparatus for a digital averaging filter, particularly suited for use with an aeronautical navigation receiver, for reducing oscillatory deviation errors that appear in a course deviation voltage produced by the receiver and occur as the result of reflect... | 12/22/1987 |
| 4705051 | Powdered cosmetic container Apparatus is described for a cosmetic container that can be used for holding at least two differently colored cosmetic powders--such as colored blush, for mixing a pre-determined portion of each powder together within the container in order to yield a res... | 11/10/1987 |