The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 4879557 | General purpose keyboard for central processing unit with microprocessor and use of this keyboard with a microcomputer A general purpose keyboard for a central processing unit with microprocessor 9, characterized in that it includes at least one set 300 of variable allocation keys, a removable booklet 2 comprising at least two pages 20, 21 specifying allocation of the key... | 11/07/1989 |
| 4856534 | Condom An improved condom which includes a thin-walled, elongated, resilient tubular condom of rubbery impervious material which is sized to jacket the penis of a wearer and a public shield to overlay the public area of a wearer about the penis and structure on ... | 08/15/1989 |
| 4844279 | Organizer chest An organizer chest with a plurality of rows of compartments for convenient use by a workman to hold tools and a wide variety of separate items; the chest is composed of a plurality of externally accessible rows of compartments peripherally arranged about ... | 07/04/1989 |
| 4827951 | Dental floss and toothpaste container The device is composed of a dental container having a portion with a dispenser for discharge of a charge of toothpaste and second portion sized to receive a spool of dental floss to be removed through a hole in the container so that a length of the floss ... | 05/09/1989 |
| 4828116 | Kit and process for use in making a representation of a selected portion of a person's body A kit and a process for making a representative reproduction of a portion of the body of a person in a selected orientation wherein the kit includes a supply of impression material, a mold-defining cavity member, which may be in two parts, and a supply of... | 05/09/1989 |
| 4821469 | Library structure for video library of real estate properties A library structure for housing in an organized and catalogued fashion a plurality of video tapes about real estate properties and related services which includes cabinets and teaser video screens displaying interesting or featured properties to attract p... | 04/18/1989 |
| 4815859 | Roller for making pizza shell A roller for forming a pizza shell, comprising a cylindrical member jacketed by a sleeve having rows of knobs of generally semi-spherical form on the outer surface and with the knobs being spaced closely adjacent one another and the knobs of each row bein... | 03/28/1989 |
| 4815153 | Inflatable play pen In one embodiment, an inflatable play pen composed of an interconnected mattress portion, upper ring portion, and spaced apart support column portions supporting the ring portion above the mattress portion and with open netting or mesh material between th... | 03/28/1989 |
| 4804321 | Spreader tool for cementitious mix A spreader tool for use in spreading a bed of predetermined thickness of cementitious material on the floor surface prior to laying tiles wherein the tool is composed of a frame having front, rear and side walls and which is open at the top and the bottom... | 02/14/1989 |
| 4799927 | Needle guide and puncture protector A needle cover of rigid plastic material to protectively jacket a medical injection needle after use which includes a tubular body having a closed end and an enlarged open end defining a mouth and a throat which converges to the needle socket portion with... | 01/24/1989 |
| 4750121 | Pension benefits system An improved pension benefits system for enrolled employees of subscriber employers including a master trust institution and a life insurer institution. The master trust institution computes and receives each subscriber employer's periodic payment thereint... | 06/07/1988 |
| 4744282 | Music box with instructional data tables In one embodiment, the musical box includes a box-like support structure and a music device disposed in the interior of the structure. A plurality of flexible continuous webs are sized to wrap around the outside of the structure. Each web has, along its o... | 05/17/1988 |
| 4729319 | Controlled explosion projectile ejection system The controlled explosion projectile ejection system utilizes a source of combustible gas through a controllable input valve into a combustion chamber. Inside the combustion chamber is a sparking means. After the chamber is loaded or filled with gas, a spa... | 03/08/1988 |
| 4729135 | Foot operated flow control assembly for a showerhead A flow control assembly designed to regulate flow of water from a showerhead through a foot operated and fluid actuated valve assembly. The valve assembly is disposed upstream of a flow of water issuing from the showerhead and a variable volume chamber is... | 03/08/1988 |
| 4704759 | Back scrubbing device A back scrubbing device comprising a plate having a main surface from which there extend a plurality of suction cups adapting the device to be mounted to a shower stall wall in a temporary location and, from the other main surface, there extends a plurali... | 11/10/1987 |
| 4651376 | Underwater self-contained cleaning assembly A cleaning assembly to be used underwater primarily for the cleaning by removing of debris from bottom and wall surfaces of swimming pools, spas, and like water containing structures. A movable carriage supports a pump assembly which includes an impeller ... | 03/24/1987 |
| 4646410 | Anchor removing assembly A pulling adaptor assembly specifically structured to be readily assembled and disassembled and thereby presented in a kit-type construction adaptable to any of a plurality of conventional pulling mechanisms such as hydraulic ram wherein the subject assem... | 03/03/1987 |
| 4641839 | Roller-ball structure A roller-ball assembly including a spherically shaped ball but comprising a multi-piece construction including a substantially centrally disposed roller element and two ball segments preferably disposed at opposite ends or sides of said roller element and... | 02/10/1987 |
| 4637157 | Multi part butt and reel seat used on fishing rods A multi component butt of the type designed for use in combination with a fishing rod used for trolling from the back of boats generally some distance from shore. The butt includes an elongated shank portion comprising a major length of the subject butt a... | 01/20/1987 |
| 4617693 | Drain pipe cleaning tool A drain cleaning assembly including a housing for storing an elongated flexible material auger type cable mounted in surrounding relation about a rotatable drum of the housing and positionable between an operable and a stored position through rotation of ... | 10/21/1986 |
| 4607444 | Portable illumination display sign An illuminated sign assembly structured to be portable and thereby usable in a variety of applications such as emergency signalling for distressed vehicles. The sign assembly is formed from a flexible material base capable of being folded upon itself and ... | 08/26/1986 |
| 4583322 | Ornamental container and display assembly for a seedling plant An assembly for holding and removably mounting a live seedling plant, preferably a containerized seedling, on either a live or an artificial tree, such as a Christmas Tree or the like, in combination with an additional decorating structure of the type typ... | 04/22/1986 |
| 4573981 | Protective sheath structure for a catheter assembly A protective sheath structure of the type primarily designed to be selectively positioned and removed from a surrounding, protective and substantially enclosing position relative to the cannula portion of a catheter assembly. Selective engagement and dise... | 03/04/1986 |
| 4571628 | Portable video viewing assembly The present invention is directed towards a portable video viewing mechanism comprising a housing generally in the form of a binocular configuration being dimensioned and configured to be hand-held and manually directed towards a predetermined field of vi... | 02/18/1986 |
| 4542717 | Fuel vaporization system for an internal combustion engine The present invention is directed towards a fuel vaporization system designed primarily for use in automobile or like vehicle internal combustion engines. Liquid fuel such as gasoline is independently forced into a vaporization structure concurrently with... | 09/24/1985 |
| 4517698 | Cargo handling ramp A cargo handling ramp including a support frame and an inclined walkway provided with hand rails along the walkway and rollers beneath the frame for moving it over a surface wherein a mechanism is provided for raising and lowering the lowermost end of the... | 05/21/1985 |
| 4483339 | Vascular surgery roll For use in vascular surgery a roll of wound strand having an outer predetermined size diameter corresponding to the inside diameter of an opened blood conduit into which it is temporarily inserted with a pigtail of one end of the roll of strand extending ... | 11/20/1984 |
| 4480645 | Smoking device A smoking device composed of a tubular body having a one-way valve between an inlet and an outlet which is adapted to permit smoke to flow from the inlet to the outlet and wherein ports are provided between the one-way valve and the outlet so that when sm... | 11/06/1984 |
| 4472151 | Flotation device A personal flotation device of a type designed and structured to be worn about the head and shoulders and upper body portion of the wearer and capable of supporting the wearer in water in a substantially face upright position to provide adequate breathing... | 09/18/1984 |
| 4419904 | Reciprocating device A reciprocating device which is composed of a base and a longitudinally movable member supported above the base on a support including rollers in engagement with the longitudinally extending member for guiding reciprocating movement of the member above th... | 12/13/1983 |
| 4318546 | Golf club swing training device Golf club swing training apparatus includes an upwardly extending support consisting of a fixed lower part and a forwardly-tiltable upper part, and a back holding member, adjustable in length and a waist holding member which members are each rotatably mou... | 03/09/1982 |