Granted Patent
Utility
US 4,214,539 · App. 05/944,539
Position sensing device for electronic sewing machine
Inventors:
John A. Herr, Wolfgang Jaffe
Patented Case
View Patent ↗
Granted: Jul 29, 1980
Filed: Sep 21, 1978
Inventors
John A. Herr
Wolfgang Jaffe
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.