Granted Patent
Utility
US 4,475,784 · App. 06/446,155
Cartridge and receptacle for use with an electronically controlled appliance
Inventor:
Joseph J. Lukawich
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Dec 2, 1982
Inventor
Joseph J. Lukawich
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.