John H. Brywig — 2 Patents at Grace Engineering

John H. Brywig has been granted 2 US patents while listed as an inventor at Grace Engineering. The first was granted in 2011 and the most recent in May 2013. John H. Brywig ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list John H. Brywig in Carsonville, MI, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
8449416	Mechanical broadhead	Nathaniel E. Grace	2013-05-28
7993224	Battery holder for a lighted archery nock	—	2011-08-09

John H. Brywig — 2 Patents

Issued Patents All Time

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