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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7192603 | Pest controlling The present invention features a sustained-release microcapsule for long-term pest controlling. In general, a microcapsule has a capsule core including active pest-control ingredients and diluents, and a capsule shell which physically separates the capsule core from... | 03/20/2007 |
| 4898670 | Cartridge bonding Membrane fibers extend into a potting compound that seals an end of the housing formed with openings in which the potting compound is seated, or through which a reinforcing pin passes. The end of the housing may be overlapped by a stepped portion of the p... | 02/06/1990 |
| 4890741 | Capsule package A pair of receptacles are connected together by flexible material for permitting the receptacles to be assembled in overlapping relationship to form a convenient package. Each receptacle includes a medication storage compartment having a child-resistant c... | 01/02/1990 |
| 4878267 | Resisting entry of an object into a space between the hinged edge of a door member hingedly attached to a associated jamb member and a surface of the jamb member A device for resisting entry of an object into a space between the hinged edge of a door and associated door jamb includes an elongated sheet of material thin enough to be placed in this space without impeding the closing of the door. The sheet has first ... | 11/07/1989 |
| 4857423 | Overcharge protection of secondary, non-aqueous batteries The invention features the use of redox reagents, dissolved in non-aqueous electrolytes, to provide overcharge protection for cells having alkali metal negative electrodes (anodes). In particular, the invention features the use of organometallic compounds... | 08/15/1989 |
| 4856118 | Headphone cushioning A headphone cushion comprises two concentric rings of nonliquid gelatin-like silicone on a layer of soft, slow recovery foam enclosed in a thin stretchable layer of polyurethane skin.... | 08/15/1989 |
| 4853598 | Fluorescent lamp controlling An apparatus for energizing a fluorescent lamp having two filament electrodes. The apparatus comprises a rectifier circuit responsive to an AC voltage for providing DC voltage and a transformer having at least a primary winding and a secondary winding for... | 08/01/1989 |
| 4819801 | Storage case A storage case for storing electronic recording devices and their boxes. The case has a base, two end walls and two side walls, each fixedly connected together to form an open box. The side walls have an upper and a lower portion, the lower portion being ... | 04/11/1989 |
| 4821322 | FM multiplex decoding Apparatus demodulates frequency-modulated information signals on a radio frequency signal carrying on a suppressed superaudio carrier signal, amplitude-modulated spectral components in a subcarrier channel frequency range above the audio frequency range a... | 04/11/1989 |
| 4817989 | Postcard A postcard assembly comprising a first, second, and third sheet, the sheets being arranged one on top of another, with adjacent sheets removably attached together. The first and second sheets have first and second upper and first and second lower surfaces... | 04/04/1989 |
| 4819000 | Scanning antenna having amplitude and phase distribution diversity A scanning beam transmit antenna system includes a source of electromagnetic energy, radiating elements and a feed network connecting the source to the radiating elements. A beam steerer controls the phase of the electromagnetic energy at each of the radi... | 04/04/1989 |
| 4816358 | Electrochemical cell Disclosed is an electrochemical cell that includes an anode, a cathode, and an electrolyte, the cathode containing more than a trace amount of a sulfur impurity capable of causing the cell to self-discharge and also containing a scavenger that reacts with... | 03/28/1989 |
| 4811904 | Spray medium inset for spraying pistols and a spraying pistol suitable for application of such insets A spray medium inset for a spraying pistol includes a spraying nozzle, and a needle for selectively closing the nozzle spray opening. The inset includes a connecting channel terminating in a cylindrical recess having an annular recess in the wall surround... | 03/14/1989 |
| 4794507 | Controlling electrical power A power controller includes a full-wave bridge rectifier circuit coupled to an A.C. line by a storage inductor with two windings and a saturating inductor. The output of the bridge rectifier is connected to a D.C. output terminal for producing output volt... | 12/27/1988 |
| 4789887 | Controlling oscillator A voltage controlled oscillator includes a VCO chip that is a monolithic circuit with a Gunn diode and varactor diode intercoupled by a resonant circuit. A detector/discriminator/power divider chip is coupled to the VCO chip through a directional coupler ... | 12/06/1988 |
| 4777372 | Right angle driving A platform for positioning inside an evacuated chamber is slidable in a y--y direction along a movable support member that is movable along an x--x direction perpendicular to the y--y direction. The movable support member is formed with end bearings that ... | 10/11/1988 |
| 4768824 | Truck bed covering A collapsible truck bed covering structure includes left and right base members fastened to the top of left and right sidewalls, respectively, of the truck bed. Left and right sidewalls are hinged at the bottom to the left and right base members, respecti... | 09/06/1988 |
| 4763580 | Supporting A support structure that may be used as a seat, table or step stool has a top panel substantially 10"×18" secured between two angled panels substantially 10" above the floor. A pair of normally vertical support members extend between the end panels in co... | 08/16/1988 |
| 4764740 | Phase shifter The present invention relates to a reflection diode phase shifter that achieves amplitude equality between phase shifts of incident energy. Amplitude equality is achieved by placing a resistor R to ground in parallel with the transmission lines connecting... | 08/16/1988 |
| 4753655 | Treating vision An artificial lens is cantilevered from a support rod in the vitreous chamber of the eye with the other end of the support rod affixed to an anterior chamber lens, the support for it, the sclera or (natural) lens capsule. There may be a number of support ... | 06/28/1988 |
| 4746821 | Constant phase limiting independent of input signal amplitude A constant phase diode limiter has a pair of oppositely poled diodes in series between the primary of an output transformer and an input terminal. The junction of the diodes is connected to a voltage source through a resistor and inductor. A capacitor hav... | 05/24/1988 |
| 4744228 | Agitatorless clothes laundering A washing machine has a stationary tub with drain outlets at the bottom periphery. A venturi conduit extends from the bottom of the tub opening upward along the axis of the tub to produce a toroidal flow of water in an open basket in the tub seated on an ... | 05/17/1988 |
| 4740795 | Dual frequency antenna feeding with coincident phase centers A dual frequency antenna feed includes colinear axially spaced coaxial and circular waveguide cavities separated by a conducting portion having a high frequency rectangular waveguide therein extending radially outward. The coaxial cavity includes a tubula... | 04/26/1988 |
| 4738032 | Inertial pendulum A pendulum has a weight suspended from a bar at an essentially frictionless pivot near the center of gravity of the weight.... | 04/19/1988 |
| 4739514 | Automatic dynamic equalizing An automatic dynamic equalizer includes left and right input terminals, an input adder and left and right output adders. The left and right input terminals are connected to inputs of the input adder and inputs of the left and right output adder, respectiv... | 04/19/1988 |
| 4737128 | Flexible unitary circular air foil A flexible, circular, elastomer air foil that is a unitary structure has a central portion that droops downward when the foil is resting on a horizontal flat surface surrounded by an annular portion that is then convex on top and concave on the bottom whe... | 04/12/1988 |
| 4737992 | Compact electroacoustical transducer with spider covering rear basket opening A loudspeaker driver has a plastic basket having front and rear portions. The front portion is formed with six radial ribs extending between a central motor cup support and an annular rim. A cup-shaped front pole piece is molded into the pole support and ... | 04/12/1988 |
| 4734749 | Semiconductor mesa contact with low parasitic capacitance and resistance Method of manufacturing silicon mesa diodes from a wafer of silicon. The surface of the wafer is coated with a first layer of silicon nitride and a second layer of silicon oxide. By masking and etching procedures, silicon nitride is left only on the porti... | 03/29/1988 |
| 4734106 | Gas separating Feed gas is directed tangentially along the non-skin surface of gas separation membrane modules comprising a cylindrical bundle of parallel contiguous hollow fibers supported to allow feed gas to flow from an inlet at one end of a cylindrical housing thro... | 03/29/1988 |
| 4731022 | Teaching arithmetic principles A balance for teaching arithmetic principles has a balance arm pivotal about a central horizontal pivot axis coincident with the axis of a support rod supported in openings at the top of opposed vertical upstanding members of a support. The balance arm ha... | 03/15/1988 |
| 4726929 | Apparatus for measuring a chemical entity in a liquid Apparatus for measuring or detecting a chemical entity in a liquid sample, the apparatus including a first module operationally connected to a second module, the first module having a flow passage for the sample, the flow passage including a sensor for me... | 02/23/1988 |
| 4727343 | Precision tuning A Gunn diode oscillator tuning mechanism includes a waveguide wall formed with a cavity at the outside of the wall for accommodating a tuning mechanism. A tuning rod opening extends between the inside of the waveguide wall and the cavity to snugly accommo... | 02/23/1988 |
| 4724491 | Inserting television advertising spots automatically A downlink dish receives television signals from a remote location transmitted by satellite. Satellite receivers demodulate these received signals and normally transmit them through a switch to modulators which modulate respective carrier signals to retra... | 02/09/1988 |
| 4723289 | Stereo electroacoustic transducing A stereo loudspeaker system includes left and right loudspeaker cabinets each having a woofer mounted off center on the front baffle and tweeters mounted in front of the woofer with the axis of each tweeter at an angle to that of the woofer. Each cabinet ... | 02/02/1988 |
| 4720905 | Pin releasing A header has three throughpins supported by glass insulating regions in the header wall having inside and outside portions. A releasable terminal formed with a central opening is soldered to each inside portion of a throughpin and is formed with a groove ... | 01/26/1988 |
| 4721959 | Monopulse comparator formed in a milled channel plate structure A monopulse comparator is formed by milling grooves in opposed surfaces of aluminum circular blocks. The milled grooves define a number of waveguides, ports and hybrid junctions. A, B, C and D ports are coupled by respective waveguides to respective side ... | 01/26/1988 |
| 4718631 | Foot isolating An antiskid shock and vibration isolating foot is formed with an annular circumferential recess about midway between its top and bottom and made of a resilient elastomer. A threaded stud is bonded to the top of the elastomer. The upper portion above the a... | 01/12/1988 |
| 4717581 | Iridium oxide coated electrodes for neural stimulation A metallic electrode made of platinum, platinum iridium alloy, stainless steel, stainless steel alloys, titanium, titanium alloys, tantalum or tantalum alloys is coated with iridium oxide. Ir(III) trichloride is heated in 5.5M HCl until 75-80% of the solu... | 01/05/1988 |
| 4711633 | Instructional device for tennis players An instructional device is provided for tennis players to identify their stroke problems and to analyze the cause of those stroke problems. In addition, the instructional device of the present invention includes a grip analysis section to help tennis play... | 12/08/1987 |
| 4711438 | Mask holding A rectangular plate holder is formed with an approximately square recess defined by an upstanding perimetrical wall having two top studs on one side and one top stud on an opposed side wall lapped to be coplanar in a common plane. The base plates include ... | 12/08/1987 |
