Inventor
HARWOOD JON W
US36 patents
⚠️ This page may combine multiple inventors who share the name “HARWOOD JON W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AP PARTS MFG
18 patentsUS4894987AJan 23, 1990
Stamp formed muffler and catalytic converter assembly
AP PARTS MFG55 citations96
US5726398AMar 10, 1998
Automotive bumper and muffler combination
AP PARTS MFG32 citations93
US5563385AOct 8, 1996
Stamp formed muffler with siphon tube
AP PARTS MFG35 citations92
US5448831ASep 12, 1995
Method of manufacturing a stamp formed muffler with hermetically sealed laminated outer shell
AP PARTS MFG46 citations92
US5164551ANov 17, 1992
Stamp formed muffler with compound reinforcement pattern for preventing shell ring
AP PARTS MFG30 citations92
US4909348AMar 20, 1990
Stamp formed exhaust muffler with conformal outer shell
AP PARTS MFG65 citations92
US4821840AApr 18, 1989
Stamp formed exhaust muffler with conformal outer shell
AP PARTS MFG52 citations92
US5042125AAug 27, 1991
Apparatus for manufacturing stamp formed mufflers
AP PARTS MFG29 citations91
US4928372AMay 29, 1990
Process for manufacturing stamp formed mufflers
AP PARTS MFG34 citations91
US4847965AJul 18, 1989
Method of manufacturing stamp formed mufflers
AP PARTS MFG27 citations91
US5597986AJan 28, 1997
Stamp formed muffler with nested chambers
AP PARTS MFG31 citations90
US5004069AApr 2, 1991
Stamp formed muffler with transverse baffle tube
AP PARTS MFG41 citations89
US5173577ADec 22, 1992
Stamp formed muffler with low back pressure
AP PARTS MFG36 citations88
US5859394AJan 12, 1999
Muffler with stamped internal plates defining tubes and separating chambers
AP PARTS MFG36 citations85
US5907904AJun 1, 1999
Method of manufacturing an exhaust muffler with stamp formed internal components
AP PARTS MFG14 citations73
US5717173AFeb 10, 1998
Exhaust mufflers with stamp formed internal components and method of manufacture
AP PARTS MFG15 citations73
US4924968AMay 15, 1990
Stamp formed muffler with reinforced outer shell
AP PARTS MFG17 citations73
US5428194AJun 27, 1995
Narrow width stamp formed muffler
AP PARTS MFG19 citations72
AP IND INC
8 patentsUS4836330AJun 6, 1989
Plural chamber stamp formed muffler with single intermediate tube
AP IND INC33 citations90
US4806726AFeb 21, 1989
Apparatus for machining a bent elongated member of variable configuration
AP IND INC26 citations90
US4765437AAug 23, 1988
Stamp formed muffler with multiple low frequency resonating chambers
AP IND INC55 citations90
US4759423AJul 26, 1988
Tube and chamber construction for an exhaust muffler
AP IND INC54 citations90
US4732025AMar 22, 1988
Precision bending apparatus and process
AP IND INC32 citations90
US4656713AApr 14, 1987
Method for forming an air gap pipe
AP IND INC34 citations90
US4760894AAug 2, 1988
Exhaust muffler with angularly aligned inlets and outlets
AP IND INC47 citations89
US4712295ADec 15, 1987
Clamp apparatus
AP IND INC16 citations69
APX GROUP INC
6 patentsUS4619292AOct 28, 1986
Air gap pipe
APX GROUP INC38 citations92
US4590652AMay 27, 1986
Method for fabricating an air gap pipe
APX GROUP INC42 citations92
US4501302AFeb 26, 1985
Air gap pipe
APX GROUP INC31 citations92
US4475623AOct 9, 1984
Universal muffler assembly
APX GROUP INC43 citations90
US4537027AAug 27, 1985
Hybrid exhaust manifold
APX GROUP INC42 citations88
US4473131ASep 25, 1984
Threaded muffler nipple and bushing
APX GROUP INC16 citations71