IP Library Granted Patent US 4,633,117
Granted Patent Utility
US 4,633,117 · App. 06/645,769

Slanted and chirped surface acoustic wave devices

Inventors: Paul Bloch, Michael E. Barnard, Edward G. S. Paige
Patented Case View Patent ↗
Granted: Dec 30, 1986 Filed: Aug 30, 1984
Inventors
Paul Bloch
Michael E. Barnard
Edward G. S. Paige
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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 4,633,117
App. No.
06/645,769
Filed
1984-08-30
Granted
1986-12-30
Kind
A