Granted Patent
Utility
US 4,446,713 · App. 06/280,488
Apparatus and method for bending insulated piping
Inventors:
Lionel H. Wheeler, Robert G. Goekler
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Jul 6, 1981
Inventors
Lionel H. Wheeler
Robert G. Goekler
Assignee (at issue)
Crutcher Resources 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.