Granted Patent
Utility
US 4,492,327 · App. 06/303,796
Tube pulling apparatus
Inventor:
Gregory Martin
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Sep 21, 1981
Inventor
Gregory Martin
Assignee (at issue)
CARRIER CORPORATION
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.