Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8184324 | Mobile information apparatus for wireless search and data transfer A mobile information apparatus for wireless digital media transfer and sharing in a wireless digital home or a wireless digital enterprise are disclosed. In a wireless ecosystem, the mobile Information apparatus may be smart phones, Internet Pads or information Pads... | 05/22/2012 |
| 6581854 | Irrigation apparatus having a lateral recessed projection An irrigation apparatus comprises an in-line dripper insert having a support for attaching a micro tube to the dripper outlet. A fluid conduit in which the insert is placed has an aperture in line with the support. The support preferably comprises a proje... | 06/24/2003 |
| 6265937 | Push-pull amplifier with dual coplanar transmission line A means of connecting a plurality of essentially identical active devices is presented for the purpose of multifunction and multiple function operation. These devices, mounted on a chip, are flip-mounted onto a circuit formed on a base substrate and havin... | 07/24/2001 |
| 6094114 | Slotline-to-slotline mounted flip chip A high frequency circuit structure including a base substrate having a planar face, a first base slotline mounted on the base substrate face and consisting of first and second, spaced-apart coplanar base conductors, and a circuit chip flip-mounted on the ... | 07/25/2000 |
| 6064253 | Multiple stage self-biasing RF transistor circuit First and second spaced-apart planar circuit ground conductors are formed on a base substrate. Multiple stages of an amplifier each have a field effect transistor (FET) flip mounted onto the substrate. A signal-return line couples the sources of the FETs ... | 05/16/2000 |
| 5821815 | Miniature active conversion between slotline and coplanar waveguide An active device, such as a field effect transistor ("FET"), converts microwave signals between a slot transmission line ("slotline") and a coplanar waveguide ("CPW") In slotline-to-CPW conversion using one or more FETs, a gate connection is made to one o... | 10/13/1998 |
| 5713631 | Dynamic backrest support system A seating support cushion system has a seat cushion with an H-shaped inflatable cell, with the sides of the "H" extending parallel to a cushion axis that corresponds to the longitudinal axis of a person sitting on the cushion, and therefore parallel to th... | 02/03/1998 |
| 5698469 | Method of making a hybrid circuit with a chip having active devices with extra-chip interconnections A process of connecting a plurality of essentially identical active devices is presented for the purpose of multifunction and multiple function operation. These devices, mounted on a chip, are flip-mounted to a circuit motherboard having large passive ele... | 12/16/1997 |
| 5678891 | Dynamic combination seating and backrest support system A seating support cushion system has a seat cushion with an H-shaped inflatable cell, with the sides of the "H" extending parallel to a cushion axis that corresponds to the longitudinal axis of a person sitting on the cushion, and therefore parallel to th... | 10/21/1997 |
| 5668512 | Coplanar waveguide-mounted flip chip having coupled ground conductors A radio-frequency power amplifier includes a multiple-FET chip that is flip mounted on a connection region of a substrate. An input impedance-matching network is also mounted on the substrate. The network includes a coplanar waveguide having an elongate w... | 09/16/1997 |
| 5662384 | Dynamic seating support system A seating support cushion system has a seat cushion with an H-shaped inflatable cell, with the sides of the "H" extending parallel to a cushion axis that corresponds to the longitudinal axis of a person sitting on the cushion, and therefore parallel to th... | 09/02/1997 |
| 5623231 | Push-pull power amplifier A means of connecting a plurality of essentially identical active devices is presented for the purpose of multifunction and multiple function operation. These devices, mounted on a chip, are flip-mounted to a circuit motherboard having large passive eleme... | 04/22/1997 |
| 5615838 | In-line retention drip emitter A generally cylindrical or partially cylindrical body is intimately received in an irrigation pipe and has an outer surface in physical contact with an inner surface of the pipe. A flow-limiting labyrinth is formed by the outer surface of the body in comb... | 04/01/1997 |
| 5612706 | Dual-array yagi antenna A driven element is disposed on an antenna axis for transmission of electromagnetic energy in a transmission direction along the antenna axis. First and second parasitic arrays are disposed on opposite sides of the antenna axis in the transmission directi... | 03/18/1997 |
| 5610563 | Slot line to CPW circuit structure A means of connecting a plurality of essentially identical active devices is presented for the purpose of multifunction and multiple function operation. These devices, mounted on a chip, are flip-mounted to a circuit motherboard having large passive eleme... | 03/11/1997 |
| 5596808 | Safety for knife-blade lock A knife has a folding blade, a blade lock in the form of a leaf spring, and a safety for preventing unlocking of the lock. One form of safety has a carrier in the form of an elongate arm mounted on the knife handle. A stud is positioned on an inside surfa... | 01/28/1997 |
| 5571072 | Dual-axis endoscope holder A cannula and associated endoscope are secured to an operating table by a mechanical linkage assembly having linear and angular connections. These connections are adjustable for supporting an endoscope extending through an incision. Two angular connection... | 11/05/1996 |
| 5549563 | Reinforcing insert for uterine manipulator A stiffener device is usable with a uterine manipulator having a catheter tube and outer sheath. The catheter tube is formed in an arc and has an insertable end adapted to be inserted into the uterus. The sheath terminates in a flange that seats against t... | 08/27/1996 |
| 5550518 | Miniature active conversion between microstrip and coplanar wave guide An active device, such as a field effect transistor ("FET") or MMIC, converts microwave signals between a microstrip transmission line ("microstrip") and a coplanar wave guide ("CPW"). In microstrip-to-CPW conversion using a simple FET, a gate connection ... | 08/27/1996 |
| 5544290 | Method and apparatus for processing data for a visual-output device with reduced buffer memory requirements A two-dimensional page representation to be printed has a combination of text, graphic and image representation types. A data memory stores data representative of the page representation. A program memory stores program instructions including a plurality ... | 08/06/1996 |
| 5539865 | Method and apparatus for processing data for a visual-output device with reduced buffer memory requirements A two-dimensional page representation to be printed has a combination of text, graphic and image representation types. A data memory stores data representative of the page representation. A program memory stores program instructions including a plurality ... | 07/23/1996 |
| 5535475 | Car wash hinged air nozzle assembly An air distribution system of a car wash air blower system is provided for directing air to a vehicle travelling along a predefined path using an air producer mounted on each side of the path for producing flowing air. Nozzle assemblies are attached to th... | 07/16/1996 |
| 5528203 | Coplanar waveguide-mounted flip chip A radio-frequency power amplifier includes a multiple-FET chip that is flip mounted on a connection region of a substrate. An input impedance-matching network is also mounted on the substrate. The network includes a coplanar waveguide having an elongate w... | 06/18/1996 |
| 5508472 | Method and apparatus for emulating the pitch varying effects of pipe organ wind systems and acoustic coupling in an electronic musical instrument Certain effects of pipe organ wind regulators and conductors, as well as certain effects of acoustic coupling of pipes within pipe organs are emulated in an electronic musical instrument. Digital signal processing is used to model the behavior of a pipe o... | 04/16/1996 |
| 5506944 | Method and apparatus for processing data for a visual-output device with reduced buffer memory requirements A two-dimensional page representation to be printed has a combination of text, graphic and image representation types. A data memory stores data representative of the page representation. A program memory stores program instructions including a plurality ... | 04/09/1996 |
| 5504842 | Method and apparatus for processing data for a visual-output device with reduced buffer memory requirements A two-dimensional page representation to be printed has a combination of text, graphic and image representation types. A data memory stores data representative of the page representation. A program memory stores program instructions including a plurality ... | 04/02/1996 |
| 5491449 | Dual-sided push-pull amplifier A Dual-Sided Push-Pull Amplifier for providing a high-gain yet low-cost amplifier capable of operating at frequencies extending above 1 GHz is disclosed. The present invention may be used in any application in which low cost amplification may be desired, ... | 02/13/1996 |
| 5471897 | Saw sharpener A sharpener frame is supported relative to a floor and has a front side. A first portion of a band saw is supported at the front side of the frame. A second portion of the band saw is also supported relative to the frame, parallel with the first portion o... | 12/05/1995 |
| 5449046 | Earth boring tool with continuous rotation impulsed steering A pump pumps a drive fluid through a drill string and drill head during drilling. A movable element is mounted in the drill head for effecting a lateral movement on the drill head when moved in response to the pressure of the drive fluid in the drill head... | 09/12/1995 |
| 5377779 | Self-stowable sawhorse with beam-supporting saddles Included are a work beam, legs and saddle assemblies made primarily of commercially available plastic pipe, such as PVC and ABS pipe. The work beam is elongate, hollow, tubular, and rigid. The ends of the beam are closed by caps, at least one of which is ... | 01/03/1995 |
| 5375397 | Curve-conforming sensor array pad and method of measuring saddle pressures on a horse A sensor array pad for sensing the pressure distribution under a saddle on the back of a horse includes a membrane made of first and second, identical substantially non-stretchable, flexible membrane portions. The membrane portions have adjacent facing ed... | 12/27/1994 |
| 5357229 | Method for tuning a microstrip device using a plastic dielectric substance A microstrip filter having a plurality of parallel resonant conductors mounted on a dielectric substrate is tuned by applying a portion of a hot-melt type glue to the filter surface. The glue is melted and then deposited on the conductors and spread acros... | 10/18/1994 |
| 5330103 | Reversing rotary drive sprinkler The epicyclic gear train for the sprinkler includes a sun gear coupled to an impeller for rotation about a central axis. A planetary gear has a single set of teeth meshing with the teeth of the sun gear for revolving about the central axis while pivoting ... | 07/19/1994 |
| 5329249 | High efficiency RF power amplifier A control network operates a GaAs FET with a quiescent current closer to the maximum output current, Imax, than to zero current. An output network couples the FET to the load and is characterized as having a low impedance at a fundamental frequ... | 07/12/1994 |
| 5324379 | Method and apparatus for producing drip irrigation conduit A plurality of emitters are attached serially along a continuous length of thread at spaced-apart locations. A first of the emitters is attached to a conduit, whereby subsequent emitters are drawn into the conduit as the conduit is drawn from the extrusio... | 06/28/1994 |
| 5317291 | Microstrip filter with reduced ground plane This microstrip comb line filter includes a planar dielectric substrate, and a planar ground member positioned on one side of the dielectric substrate and extending along a first portion of the substrate. There is a second portion of the substrate along w... | 05/31/1994 |
| 5301081 | Input protection circuit A depletion-mode MESFET is connected between an RF input terminal and ground. The gate is connected to a negative reference voltage via a bias resistor and to ground via a capacitor. A detector couples the input terminal to the gate and includes first and... | 04/05/1994 |
| 5298001 | Gymnastics safety grip apparatus A strap of leather, for extending along the palm of a user's hand, has a finger end and a wrist end, with the wrist end anchored to a pad secured around the wrist by a belt and held in place by hook and loop materials. The finger end of the strap has a do... | 03/29/1994 |
| 5280412 | Thermal/electrical feedthrough seal A microwave circuit has an electrical prong for external circuit connection, a ground and a dipole antenna. A circuit board supports the microwave circuit. A heat sink is mounted on the circuit board and has high thermal and electrical conductivity for co... | 01/18/1994 |
| 5262581 | Method and apparatus for reading selected waveform segments from memory An electronic musical instrument having fewer note generators than notes stores in a sequentially addressable memory different waveform segments corresponding to different sounds. The note generators are time multiplexed by a processor, and use end addres... | 11/16/1993 |
