Granted Patent
Utility
US 4,825,517 · App. 06/671,649
Apparatus for drawing and interlacing
Inventor:
Gerald E. Hagler
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Nov 15, 1984
Inventor
Gerald E. Hagler
Assignee (at issue)
Phillips Petroleum Company
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.