Assignee
PROFESSIONAL COIN GRADING SERV
US·4 granted patents·249 citations·filing 1990–1992
Top patents by PatentIndex Score
4 records- 0186US5220614AAutomated coin grading systemPROFESSIONAL COIN GRADING SERV·Filed 1991·Granted Jun 15, 1993·97 cites·47 claims
- 0280US5224176AAutomated coin grading systemPROFESSIONAL COIN GRADING SERV·Filed 1992·Granted Jun 29, 1993·72 cites·5 claims
- 0374US5042650ATamperproof coin casePROFESSIONAL COIN GRADING SERV·Filed 1990·Granted Aug 27, 1991·47 cites·13 claims
- 0463US5109977ATamperproof coin casePROFESSIONAL COIN GRADING SERV·Filed 1991·Granted May 5, 1992·33 cites·1 claims
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