Granted Patent
Utility
US 4,640,985 · App. 06/727,877
Snap-fitting transformer terminal cover
Inventors:
Frank J. Martin, Murray Hartman, Randy Saunders
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Apr 26, 1985
Inventors
Frank J. Martin
Murray Hartman
Randy Saunders
Assignee (at issue)
Schlumberger Canada Limited
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.