Granted Patent
Utility
US 4,364,249 · App. 06/132,978
Central door-lock system for motor vehicles
Inventor:
Frank Kleefeldt
Patented Case
View Patent ↗
Granted: Dec 21, 1982
Filed: Mar 24, 1980
Inventor
Frank Kleefeldt
Assignee (at issue)
Kiekert GmbH & Co. Kommanditgesellschaft
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.