Roy Howarth — 2 Patents at Mechanical Technology

Roy Howarth has been granted 2 US patents while listed as an inventor at Mechanical Technology. The first was granted in 1983 and the most recent in April 1986. Roy Howarth ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Roy Howarth in Clifton Park, NY, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4582328	Double acting stirling engine piston ring	—	1986-04-15	$88,000
4422649	Stirling engine piston ring	—	1983-12-27	$81,000

Roy Howarth — 2 Patents

Issued Patents All Time

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