Bizarre Patents
A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 4809468 | Light transmitter interconnecting a skylight and a ceiling opening For connection in a building between a roof containing a skylight opening and a ceiling spaced from the roof and containing a ceiling opening, a light transmitter is provided. This light transmitter includes a base-frame unit for attachment to the ceiling... | 03/07/1989 |
| 4570069 | On-board electronic oil contamination detector for vehicle engines An on-board oil quality monitor includes a tube for recirculating oil from an engine, which tube has a transparent portion located within an infra red generator and detector that produces a signal indicating excessive oil contamination when the generated ... | 02/11/1986 |
| 4479714 | Reflection densitometer with ellipsoid reflection surface A reflection densitometer includes an optical assembly formed with an ellipsoidal internal reflecting surface receiving light from a specimen at a target region located at one focus of the ellipsoidal surface and directing light to a photodetector at the ... | 10/30/1984 |
| 4438415 | Digital programmable attenuator A digitally programmable attenuator for high speed and a large dynamic range is constructed with a phase-controlled attenuator for small steps of attenuation and an attenuator of switched resistive pads for larger steps. The attenuators are connected in t... | 03/20/1984 |
| 4392108 | Broadband radiation detector for microwave and lower frequencies A radiation detector for free space microwave radiation uses thin film resistive strips, having an equivalent surface resistivity that is large compared to the characteristic impedance of free space, and diode circuits in series with the strips for derivi... | 07/05/1983 |
| 4288761 | Microstrip coupler for microwave signals A microstrip hybrid coupler uses a ground plane having different surfaces, one that is close and coupled to the terminal portions of the microstrip and the others further from and coupled to the coupled microstrip portions. Two shields extend over the cou... | 09/08/1981 |
| 4288763 | Analog phase shifter This invention relates to an analog phase shifter for radio frequency signals that employs a hybrid coupler and biased varactor diodes at its reflection terminals. The diodes are operated so that the normalized reactance is unity (equals the coupler's inp... | 09/08/1981 |
| 4286396 | Traction device for walking on ice A traction device for removable attachment to a user's shoes to assist in walking on ice has a steel plate with depending ice-piercing teeth and an elastic attachment band. The teeth lie in transverse planes and are struck and bent from a flat plate.... | 09/01/1981 |
| 4283803 | Process for immersing in a swimming pool disabled persons using a wheelchair A swimming pool lift installation for the handicapped employs a platform for carrying a wheelchair that is lowered and elevated with the platform so that a handicapped person can sit on his chair and be lowered into the pool for swimming away from the cha... | 08/18/1981 |
| 4269163 | System and apparatus for program controlled delivery of game balls An ejector for a sequence of game balls has variable device for setting a different trajectory for each ball and for varying the time interval between each ball delivery. A controller includes an input device used by the tennis player or instructor to ent... | 05/26/1981 |
| 4262329 | Security system for data processing A data processing security system employs a secure enclosure, such as a vault, for all cryptographic processes, and the maintenance of digital information in storage outside of the enclosure in encrypted form and when not in use by the host computer syste... | 04/14/1981 |
| 4249450 | Guitar and chord playing attachment pivotally mounted thereon A guitar having four strings, two frets and an attachment pivotally mounted between the frets whereby the three principal chords of any key to which it has been tuned may be obtained clearly.... | 02/10/1981 |
| 4237483 | Surveillance system This surveillance system employs a closed circuit television camera or cameras used in conjunction with an electronic cash register or registers employed at one or more point of sale stations. Combined images of transaction items viewed by a camera at a g... | 12/02/1980 |
| 4210961 | Sorting system A method is disclosed of sorting data in an electronic data processing system utilizing a digital computer and at least one random access device such as, for example, a magnetic disc or drum unit. A first simulation is performed to optimize the utilizatio... | 07/01/1980 |
| 4207518 | Broadband radiation detector with diode elements A radiation detector for free space microwave radiation uses thin film resistive strips, having an equivalent surface resistivity that is large compared to the characteristic impedance of free space, and diode circuits in series with the strips for derivi... | 06/10/1980 |
| 4192083 | Three-dimensional land-use planning model A three-dimensional land-use model is constructed in modular units and used with a modular framework so that it can be readily modified and changed as a community develops and expands.... | 03/11/1980 |
| 4191376 | Highly secure playing cards for instant lottery and games Tickets for an instant lottery are imprinted with lottery numbers and serial numbers that are uniquely related and the lottery numbers are covered from view until after purchase, to provide control and distribution of winners and a high degree of security... | 03/04/1980 |
| 4176858 | Energy absorbing bumper system A pneumatic bumper system for the protection of moving vehicles and passengers therein is used with a passenger safety device such as an inflatable air bag. A pressurized gas container has a flexible portion with an impact surface. The pressure of the com... | 12/04/1979 |
| 4164175 | Broilers and electric heaters therefor An electric broiler suitable for the charcoal style of broiling employs large surface heater blocks using relatively small high-resistance heater elements fully encased within the heater block, which is formed of cast iron or steel. Each heater element is... | 08/14/1979 |
| 4159581 | Device for instruction in the game of bridge and method of and device for dealing predetermined bridge hands A device and method for dealing predetermined bridge hands to facilitate the widespread use of competitive scoring commonly followed in duplicate or tournament bridge by using a conventional deck of playing cards and a programmed device for setting forth ... | 07/03/1979 |
| 4158082 | Laminated ferro-cement structures and method of fabrication Structures such as the shell of a boat are formed in a ferro-cement laminate composed of a fiber glass reinforced skin and ferro-cement with a coupling between the fiber glass layer and the ferro-cement that consists of fabric connector tapes that are bon... | 06/12/1979 |
| 4145715 | Surveillance system This surveillance system employs a closed circuit television camera or cameras used in conjunction with an electronic cash register or registers employed at one or more point-of sale stations. Combined images of transaction items viewed by a camera at a g... | 03/20/1979 |
| 4142321 | Three-dimensional folded chain structures Structures which have a wide variety of applications including that of educational toys are formed of chains of hinged three-dimensional units such as tetrahedra. The chains may be formed by folding a sheet of material.... | 03/06/1979 |
| 4141089 | Swimming pool apparatus for the handicapped A swimming pool lift installation for the handicapped employs a platform for carrying a wheelchair that is lowered and elevated with the platform so that a handicapped person can sit on his chair and be lowered into the pool for swimming away from the cha... | 02/27/1979 |
| 4118173 | Unidirectional seal for flow passages A seal for flow passages has directional characteristics allowing gases or fluids to flow freely in one direction while restricting the flow in the opposite direction. The seal includes a flow diverter cone (or other inclined surface) which is spacedly mo... | 10/03/1978 |
| 4111274 | Electrically-powered tricycle A tricycle for adults having stable handling characteristics provides pedal drive and electrocmechanical drive for two-speed propulsion, coasting and braking.... | 09/05/1978 |
| 4099759 | Energy absorbing bumper system An energy absorbing bumper system for protection of moving vehicles. The system comprises a flexible section and a rigid section, each containing compressed air, and an orifice passage or valve for controlling the flow of air between the flexible section ... | 07/11/1978 |
| 4095226 | System for communication A digital communication system for the transmission of digital data with a modulated carrier uses a modulation locked loop and pseudo-random code to develop synchronization signals for the digital data signals and to ensure a high level of communication r... | 06/13/1978 |
| 4066843 | Telephone circuit monitoring system A telephone circuit monitoring system includes sampling means for repeatedly sampling the bistate and linear (a-c and d-c) control signals concurrently on a plurality of trunk circuits. When any of the circuits go off-hook, a central control initiates the... | 01/03/1978 |
| 4052009 | Fibering system and apparatus A pulper for reclaiming cellulosic fiber from scrap paper includes a high-speed pressure-wave-generator impeller with individually hinged arms and a movable foraminous filter in the form of a wire screen that is flexibly mounted. A plurality of impellers ... | 10/04/1977 |
| 4050718 | Vehicle leveler system A system for leveling vehicles such as those used for family camping employs a plurality of jacks secured to the front and rear bumpers of the vehicle. The jacks are adjustable in length and are pivoted to the front and rear bumpers and have a ground enga... | 09/27/1977 |
| 4018620 | Method of hydrolyzing cellulose to monosaccharides A method of hydrolyzing cellulose to monosaccharides, especially glucose, by subjecting cellulose, under controlled temperature and pressure, to an aqueous mixture of calcium chloride and an acid, preferably hydrochloric acid, providing a low concentratio... | 04/19/1977 |
| 4009456 | Variable microwave attenuator A broadband microwave attenuator is formed by connecting a plurality of PIN diodes in a modified Tee network. Four semiconductor chips of PIN diode material are arranged in a flat layer sandwiched between conductors to form a strip-line configuration of a... | 02/22/1977 |
| 4005657 | Pyrotechnic noisemaker A pyrotechnic toy noisemaker detonates an explosive charge on impact without hazards of burning or shrapnel. A container with constricted outlet retains solid particles and releases gaseous products.... | 02/01/1977 |
| 4006006 | Fertilizer Fertilizers with controlled nutrient release produced from the treatment of solid waste with a phosphate to derive paper pulp and precipitated inks, coatings and waxes removed from the paper fibers.... | 02/01/1977 |
| 4004237 | System for communication and navigation A radio navigation and digital communication system is used for the transmission of navigation modulation and digital data. A modulation locked loop, which may be constructed with three channels, is used to develop synchronization signals for the digital ... | 01/18/1977 |
| 4002159 | Venetian blind for solar heating A venetian blind with a heat-absorptive surface on one side of the slats distributes solar heat into the ambient air of a room. For space heating the vertically-oriented, highly heat-absorptive surface of the blind has its temperature increased as solar r... | 01/11/1977 |
| 3971583 | Energy absorbing bumper system An energy absorbing bumper system for protection of moving vehicles uses a pneumatic container that is partially flexible and partially rigid. The functional volume of air necessary on a specific bumper is enclosed within the flexible and rigid sections w... | 07/27/1976 |
| 3964362 | Violin construction A violin has a body in the form of a tube, is constructed of inexpensive materials, such as paperboard, and with low cost and mass production manufacturing techniques. A hook on the top surface at the end of said tube can be attached to a band around the ... | 06/22/1976 |
| 3960135 | Solar heater and thermal barrier A distribution of solar heat into the ambient air of an enclosed space and a reduction of thermal energy loss from said ambient air and from said enclosed space is provided by means of a box attached to the inner side of a conventional window sash. A vert... | 06/01/1976 |
