Granted Patent
Utility
US 4,980,959 · App. 07/470,460
Installation tool for helical coil inserts
Inventor:
Leonard J. Czarnowski
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Jan 26, 1990
Inventor
Leonard J. Czarnowski
Assignee (at issue)
VSI, LLC
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.