Granted Patent
Utility
US 4,882,876 · App. 07/328,097
Door operator with locking mechanism
Inventor:
Kristupas Daugirdas
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Mar 23, 1989
Inventor
Kristupas Daugirdas
Assignee (at issue)
VAPOR CORP.
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.