Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 5964414 | High pressure liquid rotary nozzle with viscous retarder A small diameter high pressure liquid spray nozzle assembly has a small diameter elongated cylindrical body with a tubular nozzle shaft rotatably supported within the body. A stack of several identical radial ball bearings within a sealed bearing chamber ... | 10/12/1999 |
| 5810379 | Freewheeling drivetrain for tandem bicycles A drive train for a tandem bicycle, in which the riders are positioned one behind the other, comprising a transverse intermediate shaft mounted on the bottom tube of a tandem bicycle between the two standard bottom brackets for the respective riders. Chai... | 09/22/1998 |
| 5794883 | Unitary bulk fishline and carrier and line measuring device A device for supplying fishing line to a fish reeling device from a spool of bulk fishing line and measuring the length of line pulled from the spool by the reeling device. The bulk spool is supported for rotation about a horizontal axis at one end of a T... | 08/18/1998 |
| 5694659 | Eyewear lens wiping device A small compact pocket-size flexible device for wiping eyewear lenses. The device includes a sheet-like layer of a soft non-abrasive lens-wiping flexible material which is folded within an outer flexible layer of protective material to completely enclose ... | 12/09/1997 |
| 5626261 | Resin injector guide for windshield crack repair Apparatus for properly orienting a windshield crack repair resin injector over a crack and guiding the movable position of the injector along an elongated crooked path of the crack. The apparatus is secured to the windshield by several suction cups and in... | 05/06/1997 |
| 5591460 | Apparatus for automated windshield repair Portable self-contained apparatus for repairing a glass windshield by filling a damaged area with a repair material. An injector nozzle having a reservoir for holding an uncured liquid repair material is sealed over the damaged area of the windshield by v... | 01/07/1997 |
| 5573282 | Low turbulence joint for lined slurry pipeline A flanged joint assembly for a lined pipeline having a plastic liner and in which the joint is sealed by compression of mating plastic flanges between mating steel flanges and in which plastic flange portions are differentially compressible. Each plastic ... | 11/12/1996 |
| 5520036 | Separable keyholder with multiple keyrings A group of several identical interconnected but separable key ring support members arranged as a composite structure. Each of the support members has a respective attached key ring. Each support member has two separate attachment parts at different locati... | 05/28/1996 |
| 5472072 | Filtering breathable protective boot for a telescoping bicycle suspension A breathable protective filtering boot structure for a telescoping bicycle fork suspension comprises a generally cylindrical bellows-like rubber-like boot for each of a pair of fork legs which telescope along parallel vertical axes. Each boot is secured a... | 12/05/1995 |
| 5398577 | Method and apparatus for tree felling A method and apparatus for aiming a tree to be felled including a tool for precisely marking a face notch to be cut into a tree trunk, said tool comprising a main body, an aiming rod on the main body, and two pivoting tree-engaging marking arms mounted pi... | 03/21/1995 |
| 5331763 | Collapsible king crab pot with one-piece net A collapsible crabpot structure having four generally rectangular side frames, with a V-shaped reinforcing structure extending across each side frame. Hinge structures at each of eight corners of the crabpot structure, each hinge structure having an outwa... | 07/26/1994 |
| 5315232 | Electric field measuring system A system for measuring and recording DC electric field data at multiple locations using field mill sensors having periodically exposed sensing electrodes to provide cyclic signals, relating to the field amplitude and polarity, which are demodulated by pha... | 05/24/1994 |
| 5269861 | Structure and method for repair of sheetrock walls A structure and method for repairing a damaged section in a sheetrock wall or ceiling comprising removal of the damaged section by cutting out a specifically-sized section of the wall surrounding the damaged section, providing a like-size, tight-fitting r... | 12/14/1993 |
| 5261257 | Separable keyholder with multiple keyrings A key holder comprising two identically shaped parts each having a retainer for a plurality of apertured keys, the holder having at least one pair of mating latching structures holding the parts together when engaged and permitting the parts to be separat... | 11/16/1993 |
| 5257590 | Canoe saddle and spring strip securement means A saddle assembly for use in canoes or similar craft comprising a hollow, watertight rotationally molded structure with a sealable accessible interior compartment, secured to the craft at or near the base surface of the saddle by use of a plurality of anc... | 11/02/1993 |
| 5224247 | Strap fastener A novel buckle for fastening together strap ends, comprising two identical or identically shaped mating members, each member comprising two hook portions in spaced parallel planes, such hook portions straddling a center web portion, and incorporating a la... | 07/06/1993 |
| 5218781 | Collapsible king crab pot with one-piece net A collapsible crab pot structure comprising a crap pot frame with a removable unitary bag-like net therein secured to the frame by a rope framework within the bag-like net. The bag-like net can be made from a single piece of netting fabric according to a ... | 06/15/1993 |
| 5205306 | Spraying equipment for removing hazardous materials from objects A decontamination system for rinsing hazardous materials from victims or suited emergency personnel using hand held thin flat octagonal rings of square aluminum tubing having a plurality of radially inwardly directed nozzles for simultaneously spraying wa... | 04/27/1993 |
| 5161814 | Trailerable structure with retractable suspension A simple trailer frame is provided which may be included within a structure and which allows the frame or the structure to be easily and quickly converted into a mobile trailer on retractable wheel assemblies. When the frame is used within a structure, on... | 11/10/1992 |
| 5137297 | Trailerable structure with retractable towing hardware A large flat exhibition platform of stair-step height (71/2 inches) and convertible to a highway trailer has jacking apparatus, wheels, wheel suspension apparatus and a trailer towing member retractably concealed therein and includes an energy source, hyd... | 08/11/1992 |
| 5127482 | Expandable milling head for gas well drilling A tool head is separably attached to the end of a hollow well drilling string for cutting operations within a well and for detachment of the cutting head from the string without removing the string from the well. The head is attached by a ball clutch stru... | 07/07/1992 |
| 5118100 | Weight supporting frame for weightlifters A device for use by weightlifters for supporting a substantial weight, specifically a barbell, across the shoulders of an individual wherein the majority of the weight is transferred to the individual's hips and legs to avoid any strain on the back. The s... | 06/02/1992 |
| 5096204 | Three-dimensional book or game board structure A construction of book or game board with an open and a closed configuration, made of individual leaves in which the leaves have substantial thickness and in which the outline shape of any individual leaf is defined in essentially two dimensions. The two ... | 03/17/1992 |
| 5092615 | Collapsible beach table dolly and sled A combined collapsible beach table, dolly and sled structure having a flat smooth table-top surface slidable over a sandy beach when the table is inverted and having recessed wheels with rolling surfaces projecting only slightly from the sliding surface t... | 03/03/1992 |
| 5072455 | Heat-intercepting garment or blanket A heat-intercepting shield or shroud in the form of a garment, blanket or belt having on at least one surface thereof one or more pockets to receive replaceable packets of refreezable material which absorb large quantities of heat as the material melts. E... | 12/17/1991 |
| 5009155 | Can crusher for household use A device, suitable for household use, for the purpose of crushing ordinary aluminum beverage cans between a movable and a stationary compression plate. The movable compression plate moves generally parallel to a can's axis, initially engaging the can at a... | 04/23/1991 |
| 5008981 | Enclosed yoke clasp for bola-style necktie A clasp for the cords of a bola tie comprising two mating shell halves and a manually operable spring biased clamp disposed between the shell halves to provide an enclosed clasp which is releasable and which provides improved external appearance and mecha... | 04/23/1991 |
| 4967057 | Snow melting heater mats Individual electrically heated mats, self-regulated by use of an electrical element whose resistance varies proportionately with its temperature, used for covering walking areas to prevent accumulation of snow and ice. Each mat is provided with male and f... | 10/30/1990 |
| 4948156 | Standing lift and support for wheelchair user A simple, lightweight, easily assemblable, disassemblable and transportable frame and motive means which can be attached to a wheelchair to enable a user having a lower body disability to safely move to and from a standing position without assistance from... | 08/14/1990 |
| 4940240 | Game to promote arithmetic skills A game apparatus and related methods of play, comprising a playing board marked with a grid pattern, checker-like pieces to be moved upon the surface of the playing board and using varied markings upon the faces of the pieces and a deck of numbered cards.... | 07/10/1990 |
| 4923160 | Camming means for climbing anchors An improved climbing anchor utilizing multiple cam elements in which each cam element is independently spring biased by a flat spiral spring located within a recess in the cam element and acting between the pivot mounting and the cam element. The construc... | 05/08/1990 |
| 4900048 | Integral seamless composite bicycle frame A bicycle frame made essentially entirely of an integrally bonded composite structure throughout its main structural tubular members and at the joints securing these tubular members to each other. The tubular members, which have round and aero cross secti... | 02/13/1990 |
