IP Library › Granted Patent US 6,789,989
Granted Patent Utility
US 6,789,989 · Confirmation No. 8768

SCREW HAVING A HEAD WITH CONCAVE UNDERSIDE

Inventor: Uli Walther
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Quick Facts
Patent No.
US 6,789,989
App. No.
10/097,446
Filed
2002-03-13
Granted
2004-09-14
Pub. No.
US20030175093A1
Art Unit
3679
PTA
-91 days