George Webster Ross

Address:

4425 Iroquois St, New Orleans, LA 70126

VIN:

1FMFK19587LA59794

Make:

FORD

Model:

EXPEDITION EL

Year:

2007

US Patent:

D3516520, Oct 18, 1994

Filed:

Jun 21, 1993

Appl. No.:

D/009755

Inventors:

Russell B. Thompson - Menlo Park CA
Jeffrey N. Reynolds - Santa Clara CA
George A. Ross - San Jose CA
Patrick M. Owens - Cupertino CA
Jerome Jackson - Sunnyvale CA

Assignee:

EP Technologies, Inc. - Sunnyvale CA

US Classification:

D24138

US Patent:

55304192, Jun 25, 1996

Filed:

Jun 7, 1995

Appl. No.:

8/485279

Inventors:

George Ross - Sherman Oaks CA
Ping Lee - Sherman Oaks CA

International Classification:

G08B 1316

US Classification:

340426

Abstract:

An automobile anti-theft alarm has an internal air pressure sensor and an external pressure sensor and a connecting electric circuit. The internal pressure sensor is mounted inside the compartment of the automobile and is connected through the electric circuit to an alarm in such a way that when the internal pressure sensor detects a pressure change the alarm will sound. The external pressure sensor is mounted outside the compartment of the automobile. Air pressure fluctuations originating outside the vehicle compartment are transmitted by the flexure of the vehicle body into the vehicle. The electric circuit is connected to an alarm and to both the inner and external pressure sensors in such a way that external air pressure fluctuations affect both sensors and the outer pressure sensor produces a voltage in the electric circuit which prevents the alarm from being activated.