Granted Patent
Utility
US 4,747,834 · App. 07/101,431
Back-fill syringe
Inventor:
Gordon E. Prindle
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Sep 28, 1987
Inventor
Gordon E. Prindle
Assignee (at issue)
Ideal Instruments, 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.