Inventor

Jon W. Harwood

Inventor

Toledo, OH, US

Overview

1984–2013

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 41 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F01Nprimary

F01NGas-flow silencers or exhaust apparatus for machines or engines in general51%

Y10TTechnical subjects covered by former us classification14%

B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material11%

B23KSoldering or unsoldering8%

B23PMetal-working not otherwise provided for5%

B60KArrangement or mounting of propulsion units or of transmissions in vehicles4%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

Y02TClimate change mitigation technologies related to transportation3%

B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for1%

PatentTitleYear

8,402,756'Equal length Y-collector'2013 7,273,129'Muffler with internal heat shield'2007 5,907,904'Method of manufacturing an exhaust muffler with stamp formed internal components'1999 5,859,394'Muffler with stamped internal plates defining tubes and separating chambers'1999 5,726,398'Automotive bumper and muffler combination'1998 5,717,173'Exhaust mufflers with stamp formed internal components and method of manufacture'1998 5,597,986'Stamp formed muffler with nested chambers'1997 5,563,385'Stamp formed muffler with siphon tube'1996 5,563,383'Stamp formed muffler with integral evacuation tube'1996 5,448,831'Method of manufacturing a stamp formed muffler with hermetically sealed laminated outer shell'1995 5,428,194'Narrow width stamp formed muffler'1995 5,173,577'Stamp formed muffler with low back pressure'1992 5,164,551'Stamp formed muffler with compound reinforcement pattern for preventing shell ring'1992 5,042,125'Apparatus for manufacturing stamp formed mufflers'1991 5,004,069'Stamp formed muffler with transverse baffle tube'1991 RE033370'Stamp formed muffler'1990 4,928,372'Process for manufacturing stamp formed mufflers'1990 4,924,968'Stamp formed muffler with reinforced outer shell'1990 4,909,348'Stamp formed exhaust muffler with conformal outer shell'1990 4,901,815'Stamp formed mufflers'1990 4,894,987'Stamp formed muffler and catalytic converter assembly'1990 4,847,965'Method of manufacturing stamp formed mufflers'1989 4,836,330'Plural chamber stamp formed muffler with single intermediate tube'1989 4,821,840'Stamp formed exhaust muffler with conformal outer shell'1989 4,806,726'Apparatus for machining a bent elongated member of variable configuration'1989 4,777,708'Method for manufacturing an exhaust manifold'1988 4,765,437'Stamp formed muffler with multiple low frequency resonating chambers'1988 4,760,894'Exhaust muffler with angularly aligned inlets and outlets'1988 4,759,423'Tube and chamber construction for an exhaust muffler'1988 4,736,817'Stamp formed muffler'1988 4,732,025'Precision bending apparatus and process'1988 4,712,295'Clamp apparatus'1987 4,700,806'Stamp formed muffler'1987 4,656,713'Method for forming an air gap pipe'1987 4,656,712'Method for manufacturing a heat shielded exhaust system component'1987 4,619,292'Air gap pipe'1986 4,590,652'Method for fabricating an air gap pipe'1986 4,537,027'Hybrid exhaust manifold'1985 4,501,302'Air gap pipe'1985 4,475,623'Universal muffler assembly'1984 4,473,131'Threaded muffler nipple and bushing'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–1986Patents assigned to APX GROUP INC (6)· patent assignee history

1984–2013Based in Toledo, OH, US· patent location history

1987–1989Patents assigned to AP IND INC (12)· patent assignee history

1989–1999Patents assigned to AP PARTS MFG (18)· patent assignee history

1996Patents assigned to APPARTS MANUFACTURING COMPANY (1)· patent assignee history

2007–2013Patents assigned to FAURECIA EXHAUST SYSTEMS INC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
AP PARTS MFG	18	1989–1999
AP IND INC	12	1987–1989
APX GROUP INC	6	1984–1986
FAURECIA EXHAUST SYSTEMS INC	2	2007–2013
APPARTS MANUFACTURING COMPANY	1	1996

Locations

Location	Patents	Span
Toledo, OH, US	41	1984–2013