William J. Harrold

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Derry, NH, US

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic field cancellation circuit
- Patent number 5,066,891
- Issue date Nov 19, 1991
- Raytheon Company
- William J. Harrold
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Self-biased modular magnetostrictive driver and transducer
- Patent number 4,845,450
- Issue date Jul 4, 1989
- Raytheon Company
- Raymond Porzio
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Grant
Permanent magnet biased magnetostrictive transducer
- Patent number 4,703,464
- Issue date Oct 27, 1987
- Raytheon Company
- Thomas R. Howarth
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Grant
Magnetic drum separator
- Patent number 4,693,812
- Issue date Sep 15, 1987
- Raytheon Company
- Bruce E. Bond
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...