COLT INDUSTRIES INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5153359 Catridge magazine for use with different type cartridges and method of dispensing cartridgesExpiredDec 05, 89Oct 06, 92[F41A]
4786778 Electrical discharge machining fine finish circuit with symmetrical waveform in both polaritiesExpiredAug 29, 86Nov 22, 88[B23H]
4777339 Gap voltage sensing network for electrical discharge machining power supplyExpiredAug 29, 86Oct 11, 88[B23H]
4774103 Method of reinforcing a ceramic body of silicon carbideExpiredFeb 28, 86Sep 27, 88[C04B]
4737319 Carburetor fuel bowl assemblyExpiredDec 11, 86Apr 12, 88[F02M]
4733043 Ram stabilizing circuit for electrical discharge machineExpiredNov 22, 85Mar 22, 88[B23H]
4733058 Fail transistor detection and display system for electrical discharge machining apparatusExpiredFeb 28, 86Mar 22, 88[B23H, H02H]
4700258 Lightning arrester system for underground loop distribution circuitExpiredJul 21, 86Oct 13, 87[H02H]
4698543 Electrode for electrical discharge machiningExpiredJan 29, 82Oct 06, 87[H01J]
4491713 Power and sensing cable arrangement for electrical discharge machining assemblyExpiredOct 28, 81Jan 01, 85[B23P, H01B]
4475025 Cycle timer circuit for electrical discharge machiningExpiredSep 20, 82Oct 02, 84[B23P]
4471198 Cut-off protection system for electrical discharge machining apparatusExpiredMar 23, 82Sep 11, 84[B23P]
4460815 Current limit system and method for electrical discharge machining apparatusExpiredMay 17, 82Jul 17, 84[B23P]
4454713 Pulse width modulated fuel metering systemExpiredJun 04, 81Jun 19, 84[F02C]
4443682 Superimposed high striking voltage power supply circuit for electrical discharge machiningExpiredOct 26, 81Apr 17, 84[B23P]
4399483 Solenoid current controlExpiredFeb 08, 82Aug 16, 83[H01H]
4372222 Screw and floating drive nut assemblyExpiredOct 06, 80Feb 08, 83[A47B, F16H]
4320278 Servo feed system for electrical discharge machining apparatusExpiredMar 26, 79Mar 16, 82[B23P]
4320279 Programmable pulse generator for electrical discharge machining apparatusExpiredAug 21, 79Mar 16, 82[B23P]
4319114 Current limit system for electrical discharge machining apparatusExpiredAug 21, 79Mar 09, 82[B23P]

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