Granted Patent
Utility
US 4,342,272 · App. 06/081,404
Presser bar biasing spring structure
Inventors:
James A. Transue, William Weisz
Patented Case
View Patent ↗
Granted: Aug 3, 1982
Filed: Oct 3, 1979
Inventors
James A. Transue
William Weisz
Assignee (at issue)
The Singer Company Limited
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.