Granted Patent
Utility
US 4,957,829 · App. 07/371,368
Modular battery plant system assembly comprising multiple unit cell modules
Inventor:
Joel Thomas Holl
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Jun 26, 1989
Inventor
Joel Thomas Holl
Assignee (at issue)
AT&T Bell Laboratories
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.