Granted Patent
Utility
US 4,829,218 · App. 07/129,475
Direct current adjusting device
Inventor:
Alfred Bauer
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Dec 7, 1987
Inventor
Alfred Bauer
Assignee (at issue)
The Braun 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.