Granted Patent
Utility
US 4,067,495 · App. 05/608,792
Unitary spring clip rail fastener
Inventor:
Khurshid Qureshi
Patented Case
View Patent ↗
Granted: Jan 10, 1978
Filed: Aug 28, 1975
Inventor
Khurshid Qureshi
Assignee (at issue)
Portec Inc., Railway Products Div.
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.