IP Library Granted Patent US 4,873,568
Granted Patent Utility
US 4,873,568 · App. 07/246,054

Digital video effects apparatus

Inventors: Richard A. Jackson, John Abt, Ronnie D. Barnett
Patented Case View Patent ↗
Granted: Oct 10, 1989 Filed: Sep 19, 1988
Inventors
Richard A. Jackson
John Abt
Ronnie D. Barnett
Assignee (at issue)
GRASS VALLEY LIMITED

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 4,873,568
App. No.
07/246,054
Filed
1988-09-19
Granted
1989-10-10
Kind
A