Granted Patent
Utility
US 4,424,505 · App. 06/473,937
Electric coil assembly
Inventors:
Kenji Yatsushiro, George F. Kuchuris
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Mar 10, 1983
Inventors
Kenji Yatsushiro
George F. Kuchuris
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.