Granted Patent
Utility
US 4,418,561 · App. 06/256,710
Apparatus for manufacture of tunnel tubes
Inventors:
Edward Johnston, Morton Jacobs, Melvin E. Miller, Robert August Kaucic
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Apr 23, 1981
Inventors
Edward Johnston
Morton Jacobs
Melvin E. Miller
Robert August Kaucic
Assignee (at issue)
AMCA International 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.