Granted Patent
Utility
US 4,638,178 · App. 06/771,872
Modular power system
Inventor:
Dennis J. Kayser
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Sep 3, 1985
Inventor
Dennis J. Kayser
Assignee (at issue)
Wang Laboratories, Inc.
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.