Granted Patent
Utility
US 4,414,907 · App. 06/365,754
Buttonhole width adjusting mechanism
Inventor:
Edward J. Tullman
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Apr 5, 1982
Inventor
Edward J. Tullman
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.