John E. Briggs

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Morrice, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Triangulation rangefinder and sight positioning system
- Patent number 5,914,775
- Issue date Jun 22, 1999
- Browning
- Jeffrey B. Hargrove
- F41 - WEAPONS
Information Patent Grant
Triangulation rangefinder for archers
- Patent number 5,479,712
- Issue date Jan 2, 1996
- Jeffrey B. Hargrove
- F41 - WEAPONS