Granted Patent
Utility
US 4,421,034 · App. 06/274,768
Compact bidirectionally operative tie exchanging apparatus
Inventor:
Franz Allmer
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Jun 18, 1981
Inventor
Franz Allmer
Assignee (at issue)
Canron Corporation
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.