Granted Patent
Utility
US 4,554,975 · App. 06/385,528
Hold down apparatus for wireline operated gun
Inventors:
Roy R. Vann, Flint R. George
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Jun 7, 1982
Inventors
Roy R. Vann
Flint R. George
Assignee (at issue)
Geo Vann, 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.