Granted Patent
Utility
US 4,339,844 · App. 05/921,017
Assembly for holding open a door or the like
Inventor:
Dale Shatters
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Jun 30, 1978
Inventor
Dale Shatters
Assignee (at issue)
Caterpillar Tractor Co.
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.