Granted Patent
Utility
US 5,107,390 · App. 07/621,225
Shell-form transformer in a battery powered impact device
Inventor:
Sandor Goldner
Patented Case
View Patent ↗
Granted: Apr 21, 1992
Filed: Nov 30, 1990
Inventor
Sandor Goldner
Assignee (at issue)
Arrow Fastener Company, LLC
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.