Ultrasonic intrusion alarm

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a top perspective view of the ultrasonic intrusion alarm showing our new design;

FIG. 2 is a top plan view thereof on an enlarged scale;

FIG. 3 is a side view thereof on an enlarged scale, and the other side is a mirror image;

FIG. 4 is a bottom perspective view thereof on an enlarged scale; and

FIG. 5 is a bottom view thereof on an enlarged scale.

Referenced Cited
U.S. Patent Documents
3135950 June 1964 Finkle
3681603 August 1972 Scheidweiler et al.
D211427 June 1968 Brubaker
D233931 December 1974 Goble et al.
Patent History
Patent number: D242778
Type: Grant
Filed: Jul 10, 1975
Date of Patent: Dec 21, 1976
Assignee: Sonitrix, Inc. (Boulder, CO)
Inventors: Ralph W. Goble (Eldora, CO), Kenneth R. Hackett (Boulder, CO)
Primary Examiner: Susie J. Mercer
Attorney: Max L. Wymore
Application Number: 5/594,660
Classifications
Current U.S. Class: D10/106
International Classification: D1006;