AP PARTS MANUFACTURING COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES 865

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5859394 Muffler with stamped internal plates defining tubes and separating chambersJun 12, 97Jan 12, 99[F01N]
5816361 Exhaust mufflers with stamp formed internal components and method of manufactureSep 17, 97Oct 06, 98[F01N]
5726398 Automotive bumper and muffler combinationFeb 26, 97Mar 10, 98[F01N]
5473891 Three-piece stamp formed connector for achieving equal length exhaust pipesJun 10, 94Dec 12, 95[F01N]
5390494 Pipe assembly for efficient light-off of catalytic converterApr 27, 93Feb 21, 95[F01N]
5327722 Stamp formed connector for achieving equal length exhaust pipesAug 09, 93Jul 12, 94[F01N]
5280142 Heat shielded exhaust system componentOct 18, 91Jan 18, 94[F01N]
5252788 Stamp formed muffler with in-line expansion chamber and arcuately formed effective flow tubesApr 10, 92Oct 12, 93[F01N]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5907904 Method of manufacturing an exhaust muffler with stamp formed internal componentsExpiredJul 28, 97Jun 01, 99[B23P]
5717173 Exhaust mufflers with stamp formed internal components and method of manufactureExpiredMar 22, 96Feb 10, 98[F01N]
5597986 Stamp formed muffler with nested chambersExpiredFeb 27, 95Jan 28, 97[F01N]
5563383 Stamp formed muffler with integral evacuation tubeExpiredMar 07, 95Oct 08, 96[F01N]
5563385 Stamp formed muffler with siphon tubeExpiredMar 07, 95Oct 08, 96[F01N]
D363908 Conformal stamp formed mufflerExpiredAug 18, 94Nov 07, 95[]
5448831 Method of manufacturing a stamp formed muffler with hermetically sealed laminated outer shellExpiredNov 08, 93Sep 12, 95[B23P]
5428194 Narrow width stamp formed mufflerExpiredOct 19, 93Jun 27, 95[F01N]
5173577 Stamp formed muffler with low back pressureExpiredSep 04, 90Dec 22, 92[F01N]
5164551 Stamp formed muffler with compound reinforcement pattern for preventing shell ringExpiredDec 03, 90Nov 17, 92[F01N]
5042125 Apparatus for manufacturing stamp formed mufflersExpiredMay 24, 90Aug 27, 91[B23P]
5004069 Stamp formed muffler with transverse baffle tubeExpiredJan 26, 90Apr 02, 91[F01N]
RE33370 Stamp formed mufflerExpiredMay 10, 89Oct 09, 90[F01N]
4958701 Stamp formed muffler with pocket-free baffle creaseExpiredMar 26, 90Sep 25, 90[F01N]
4928372 Process for manufacturing stamp formed mufflersExpiredApr 07, 89May 29, 90[B21K]
4924968 Stamp formed muffler with reinforced outer shellExpiredAug 03, 88May 15, 90[F01N]
4909348 Stamp formed exhaust muffler with conformal outer shellExpiredNov 07, 88Mar 20, 90[F01N]
4905791 Light weight hybrid exhaust muffler and method of manufactureExpiredJun 27, 89Mar 06, 90[F01N]
4903815 Automatic vending machine and system for dispensing articlesExpiredMar 25, 88Feb 27, 90[B65G, G07F]
4901816 Light weight hybrid exhaust mufflerExpiredJan 23, 89Feb 20, 90[F01N]

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