The Stoneleigh Trust

Patent Applications and Registrations

Patent applications and USPTO patent grants for The Stoneleigh Trust.The latest application filed is for "hydrophone design to overcome reduction in leakage resistance between electrode surface of transducer element assembly and the water in which the hydrophone is immersed".

Company Profile

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The Stoneleigh Trust - Cohasset MA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Hydrophone design to overcome reduction in leakage resistance between electrode surface of transducer element assembly and the water in which the hydrophone is immersed Grant 4,700,333 - Massa , et al. October 13, 1	1987-10-13
Mechanoacoustic transducer for use in transmitting high acoustic power densities into geological formations such as oil-saturated sandstone or shale Grant 4,469,175 - Massa September 4, 1	1984-09-04
Acoustic alarm repeater system Grant 4,450,436 - Massa May 22, 1	1984-05-22
High efficiency broadband directional sonar transducer Grant 4,439,847 - Massa March 27, 1	1984-03-27
Ultrasonic transducers Grant 4,433,399 - Massa February 21, 1	1984-02-21
Means for detecting the accumulation of frost in a low temperature refrigeration system Grant 4,428,206 - Massa January 31, 1	1984-01-31
Apparatus and method for the non-destructive testing of the physical integrity of a structural part Grant 4,342,229 - Massa August 3, 1	1982-08-03
Mechanoacoustic transducer for use in transmitting high acoustic power densities into geological formations such as oil-saturated sandstone or shale Grant 4,332,017 - Massa May 25, 1	1982-05-25
Low frequency sonar systems Grant 4,305,140 - Massa December 8, 1	1981-12-08
Low-frequency directional sonar systems Grant 4,305,141 - Massa December 8, 1	1981-12-08
System for precisely and economically adjusting the resonance frequence of electroacoustic transducers Grant 4,281,484 - Massa August 4, 1	1981-08-04
Sonic ranging systems to eliminate errors due to variations in the sound velocity in the medium Grant 4,210,969 - Massa July 1, 1	1980-07-01
Intrusion alarm systems Grant 4,189,719 - Massa , et al. February 19, 1	1980-02-19

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