Granted Patent
Utility
US 4,765,404 · App. 07/037,517
Whipstock packer assembly
Inventors:
Thomas F. Bailey, John E. Campbell
Patented Case
View Patent ↗
Granted: Aug 23, 1988
Filed: Apr 13, 1987
Inventors
Thomas F. Bailey
John E. Campbell
Assignee (at issue)
Drilex Systems, 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.