Ultrasonic intrusion detector

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Information

Patent Grant
D248930

References
Source

Patent Number
D248,930
Date Filed
Wednesday, February 16, 1977
48 years ago
Date Issued
Tuesday, August 15, 1978
47 years ago

Inventors
- William G. Kahl Jr.
Original Assignees
- Arrowhead Enterprises, Inc.
Examiners
- Lucas; Susan J.
Agents
- Bramblett, Jr.; Garold E.

US Classifications
- D10 - Measuring, testing, or signalling instruments
Field of Search
- US
- D10 104
- D10 106
- D10 121
- D13 32
- D13 40
- D13 41
- 340 227 R
- 340 2271
- 340 228 R
- 340 2281
- 340 2282
- 340 237 R
- 340 237 S
- 340 258 R
- 340 276
- 340 280
- 343 5 DD
International Classifications
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for an ultrasonic intrusion detector, substantially as shown and described.

US Referenced Citations (4)

Number	Name	Date	Kind
D217037	Weinstock	Mar 1970
D243513	Galvin et al.	Mar 1977
3747109	Corbell et al.	Jul 1973
3980998	McIntosh	Sep 1976

Non-Patent Literature Citations (1)

Entry
New Equipment Digest, Nov. 1973, p. 48, Intrusion Alarm (bottom).