Assignee
PROGRESSIVE SECURITY PRODUCTS
US·2 granted patents·54 citations·filing 1987–1989
Top patents by PatentIndex Score
2 records- 0172US4876783AMethod and apparatus for conversion of doorknob lock setsPROGRESSIVE SECURITY PRODUCTS·Filed 1987·Granted Oct 31, 1989·37 cites·21 claims
- 0255US5036575AMethod and apparatus for conversion of doorknob lock setsPROGRESSIVE SECURITY PRODUCTS·Filed 1989·Granted Aug 6, 1991·17 cites·7 claims
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