Granted Patent
Utility
US 4,885,876 · App. 07/210,213
Sander tool apparatus
Inventor:
David R. Henke
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Jun 17, 1988
Inventor
David R. Henke
Assignee (at issue)
Warner Manufacturing Company
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.