DL

David C. Longren

FC Federal Cartridge: 2 patents #16 of 47Top 35%
📍 Maple Grove, MN: #477 of 1,211 inventorsTop 40%
🗺 Minnesota: #19,064 of 52,454 inventorsTop 40%
Overall (All Time): #1,621,364 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6202561 Shotshell having pellets of different densities in stratified layers Lawrence P. Head, Robert L. Kramer, J. Bruce Warren 2001-03-20
5859090 Injection-modulable, polycaprolactone-based, biodegradable plastic articles such as shotshell components, and method of manufacturing same Mohammed Shahid 1999-01-12
5175389 Frontally guided sabot bullet Robert L. Kramer, Jerry J. Rubatt 1992-12-29