James E. Cartwright — 2 Patents at Helix Technology

James E. Cartwright has been granted 2 US patents while listed as an inventor at Helix Technology. The first was granted in 1987 and the most recent in May 1989. James E. Cartwright ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list James E. Cartwright in Bellingham, MA, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4834136	Pressure relief filter and valve and cryopump utilizing the same	Edward Bourke	1989-05-30	$228,000
4697617	Pressure relief filter and valve and cryopump utilizing the same	Edward Bourke	1987-10-06	$642,000

James E. Cartwright — 2 Patents

Issued Patents All Time

Patent Widget