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 |
| 4390962 | Latched multivalued full adder A synchronous latched multivalued full adder for processing a first input current having any one of a plurality of multivalues, including a quantizer for receiving current, for generating a sum logical output current and a carry logical output current bei... | 06/28/1983 |
| 4377741 | Apparatus for producing updated information on a tangible medium Apparatus for producing updated information on a tangible medium including a hand-held type instrument having an optical character reader to read present information on the medium, a programmable bus-oriented computing type network, spaced from the instru... | 03/22/1983 |
| 4360309 | Hydraulic cylinder with spherical bearing mount A hydraulic cylinder mount assembly (50) for a cylinder (42) having first and second ends (52,64) includes a spherical load bearing surface (96) located at one of said first and second ends (52,64), which has a diameter (98) which is less than the diamete... | 11/23/1982 |
| 4359065 | Valve A valve, of compact design, permits the opening and blocking of a liquid flow whose level is directly proportional to the operation of the valve, with the use of conventional floats being completely abandoned, and with the hydraulic mechanism of said valv... | 11/16/1982 |
| 4355599 | Flea collar kit A flea collar kit comprises a container of liquid flea repellent, a dispenser in the form of an eye dropper, and an adjustable collar composed of an absorbent material.... | 10/26/1982 |
| 4351446 | High-security fill cap for underground storage tanks A high-security fill cap is adapted for releasable attachment to the open end of a fill pipe, connected to an underground fuel storage tank or the like. The fill cap comprises an annular cap, a plurality of latches pivotally mounted on the cap for movemen... | 09/28/1982 |
| 4348972 | Multipurpose trimaran Generally, different boats are needed for pulling waterskiers, sailing, fishing and camping. The reason for this is that a boat which would efficiently operate for all of these purposes, and which was sufficiently small to be trailerable, has not been ava... | 09/14/1982 |
| 4346962 | Light analyzing lenticular screen for viewing stereo images A screen construction enables three dimensional perception of projected stereo images without necessarily requiring that the viewer wear analyzing eyeglasses. Three dimensional shadow image data is generated by projecting light towards the screen, through... | 08/31/1982 |
| 4342955 | Voltage regulator for a fixed field A.C. generator A voltage regulator for regulating the supply of power by a fixed field A.C. generator which generates current to charge a battery, including an openable and closeable current charging path being connectable between the fixed field A.C. generator and the ... | 08/03/1982 |
| 4339926 | Vortex tube A vortex tube has a vortex generator portion in the form of a right circular cylindrical re-entrant cavity having end walls defining a right circular cylindrical volume therewithin with a nozzle means separating such volume from the remainder of the cavit... | 07/20/1982 |
| 4339426 | Bleomycin analog Bleomycin's affinity for tumorous tissue and its ability to complex with cobalt has lead to its use in vivo as a complex with 57 Cobalt. This complex has given excellent tumor images and has been useful for diagnostic purposes. Unfortunately, | 07/13/1982 |
| 4339300 | Process for smoothing surfaces of crystalline materials A process for smoothing surfaces of crystalline materials such as sapphire or the like is disclosed which is capable of producing surfaces which are near atomically smooth. The process comprises the steps of substantially atomically removing crystalline m... | 07/13/1982 |
| 4338991 | Combined solar heating and passive cooling apparatus Hitherto, efficient combined solar heating and passive cooling has not been available in a convenient, modular, relatively simple to install, reasonably priced apparatus. A reservoir (12) has a cover (32) having upper (42) and lower (44) reflective surfac... | 07/13/1982 |
| 4338039 | Toenail Disclosed is a toenail having a generally triangular shaped head and one or more shanks. The head has two wood bearing surfaces which are typically formed at right angles to each other and a third head surface adapted to be driven, typically by a hammer. ... | 07/06/1982 |
| 4337213 | Controlled crystallization diperoxyacid process Diperoxyacids are unstable compounds, and processes for their production have normally provided relatively low product throughputs per reactor vessel volume. The present invention is a method for making diperoxyacids in which formation of the diperoxyacid... | 06/29/1982 |
| 4337207 | Biologically active catecholamine derivatives Biologically active derivatives of norepinephrine are disclosed. Such derivatives are catecholamines wherein isoproterenol is modified by extending the isopropyl functional grouping to an alkyl, aryl, or alkyl-aryl chain of variable length where said chai... | 06/29/1982 |
| 4336669 | Planting container This invention provides a container (10) for planting seeds or seedlings either manually, mechanically, or by air drop. The container (10) includes at least one tubular cone (22) formed by fluid hardened by freezing and having a tapered lower end (24), an... | 06/29/1982 |
| 4336468 | Simplified combinational logic circuits and method of designing same A logic circuit and method for implementing a given, partially symmetric Boolean function f(x1 -xn) which is pairwise symmetric with respect to at least one pair xi xj of variables such that the function is inva... | 06/22/1982 |
| 4335344 | Voltage regulator for a controlled field generator A voltage regulator which regulates field current through a controlled field generator used to charge a battery, including a battery voltage sensing circuit which generates logic control signals in response to the battery voltage being above or below a pr... | 06/15/1982 |
| 4332537 | Encapsulation mold with removable cavity plates A cavity plate means is removably positioned between upper and lower mold plates with the upper surface of the cavity plate means flush against the upper mold plate. The cavity plate means has openings from top to bottom thereof and holds objects spaced f... | 06/01/1982 |
| 4328164 | Cobalt alkylnitroso complexes and methods therewith This invention provides a general method for the conversion of alkenes to primary vicinal diamines by use of a cobalt alkylnitroso complex and reduction with lithium aluminum hydride. A preferred species has the structure ##STR1##... | 05/04/1982 |
| 4326671 | Anti-siphon selector valve An anti-siphon, selector valve for directing fluid into one of a plurality of lines. The valve includes a valve body having an input port and a plurality of output ports and a U-shaped conduit mounted on the valve body and selectively connectable between ... | 04/27/1982 |