John R. MacGregor — 2 Patents at Raycon

John R. MacGregor has been granted 2 US patents while listed as an inventor at Raycon. The first was granted in 1982 and the most recent in April 1985. John R. MacGregor ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list John R. MacGregor in Ann Arbor, MI, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4510365	Electronic depth controller for EDM apparatus	Gary F. Rupert, Thomas M. Kennedy	1985-04-09	$9,820,000
4361745	Process control for electrical discharge machining apparatus	Gary F. Rupert, Thomas M. Kennedy	1982-11-30	$4,955,000