Granted Patent
Utility
US 4,517,828 · App. 06/508,464
Apparatus for leak testing of pipe
Inventors:
Darwin L. Miller, Ronnie F. Miller
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Jun 28, 1983
Inventors
Darwin L. Miller
Ronnie F. Miller
Assignee (at issue)
Damco Testers, Inc.
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.