Granted Patent
Utility
US 4,778,469 · App. 06/926,702
Method of forming tissue ingrowth surface on surgical implants
Inventors:
Ruey Y. Lin, Casper F. Stark
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Nov 4, 1986
Inventors
Ruey Y. Lin
Casper F. Stark
Assignee (at issue)
Pfizer Hospital Products Group, 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.