IP Library › Granted Patent US 4,609,988
Granted Patent Utility
US 4,609,988 · App. 06/476,090

Automatic prediction and capture of a preselected altitude for aircraft

Inventor: Terry L. Zweifel
Patented Case View Patent ↗
Granted: Sep 2, 1986 Filed: Mar 17, 1983
Inventor
Terry L. Zweifel
Assignee (at issue)
Sperry Corp.

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 4,609,988
App. No.
06/476,090
Filed
1983-03-17
Granted
1986-09-02
Kind
A