Donald L. Ewing — 2 Patents at Forney Engineering

Donald L. Ewing has been granted 2 US patents while listed as an inventor at Forney Engineering. The first was granted in 1981 and the most recent in November 1989. Donald L. Ewing ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Donald L. Ewing in Richardson, TX, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4878831	Infrared flame detector adaptable for different fuels	—	1989-11-07	$3,916,000
4253148	Distributed single board computer industrial control system	William D. Johnson, James S. Grisham, Jr.	1981-02-24	$5,854,000

Donald L. Ewing — 2 Patents

Issued Patents All Time

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