Granted Patent
Utility
US 4,505,487 · App. 06/349,104
Dead stop for collet chucks
Inventors:
Paul A. Davignon, Michael G. Duclos
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Feb 16, 1982
Inventors
Paul A. Davignon
Michael G. Duclos
Assignee (at issue)
American Optical 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.