IP Library › Granted Patent US 5,404,020
Granted Patent Utility
US 5,404,020 · App. 08/055,620

Phase plate design for aligning multiple inkjet cartridges by scanning a reference pattern

Inventor: Keith E. Cobbs
Patented Case View Patent ↗
Granted: Apr 4, 1995 Filed: Apr 30, 1993
Inventor
Keith E. Cobbs
Assignee (at issue)
Hewlett-Packard Company, L.P.

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 5,404,020
App. No.
08/055,620
Filed
1993-04-30
Granted
1995-04-04
Kind
A