Granted Patent
Utility
US 6,035,689 · App. 09/103,390
Rigid sheet metal rivet button fabrication for convenience-feature can stock
Inventors:
Der-Form Chang, Jyhwen Wang
Patented Case
View Patent ↗
Granted: Mar 14, 2000
Filed: Jun 24, 1998
Inventors
Der-Form Chang
Jyhwen Wang
Assignee (at issue)
Weirton Steeel Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.