IP Library › Granted Patent US 4,815,493
Granted Patent Utility
US 4,815,493 · App. 07/098,095

Cartridge bypass valve

Inventors: Daniel W. Miller, Albert F. Cella
Patented Case View Patent ↗
Granted: Mar 28, 1989 Filed: Sep 17, 1987
Inventors
Daniel W. Miller
Albert F. Cella
Assignee (at issue)
Parker-Hannifin Corporation

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,815,493
App. No.
07/098,095
Filed
1987-09-17
Granted
1989-03-28
Kind
A