Granted Patent
Utility
US 4,421,043 · App. 06/386,176
Convertible bed for a sewing machine
Inventors:
Boleslaw Kornatowski, Kenneth D. Adams
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Jun 8, 1982
Inventors
Boleslaw Kornatowski
Kenneth D. Adams
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.