Granted Patent
Utility
US 4,452,555 · App. 06/303,549
Attachment apparatus
Inventor:
Francis C. Calabro
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Sep 18, 1981
Inventor
Francis C. Calabro
Assignee (at issue)
UNION CO., LTD.
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.