John Willison — 6 Patents at Joy Mm Delaware

John Willison has been granted 6 US patents while listed as an inventor at Joy Mm Delaware. The first was granted in 1986 and the most recent in February 2018. John Willison ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list John Willison in Cranberry, PA, US.

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
9903202	Shield for sumping frame of mining machine	—	2018-02-27
9482090	Air flow system for mining machine	Richard D. Boyd, Brad Neilson	2016-11-01
9291052	Air flow system for mining machine	Richard D. Boyd, Brad Neilson	2016-03-22
8231179	Cutter drum extension mechanism	Joseph P. Gierlach	2012-07-31
7703857	Continuous miner having a sumping frame	—	2010-04-27
4569489	Cable tension control device	George R. Frey, Ronald K. Dickey, Daryl A. Bleakley	1986-02-11	$1,876,000

John Willison — 6 Patents

Issued Patents All Time

Patent Widget