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PATENTED INVENTIONS

 Some patents are available for licensing call 781-383-2002

6,950,373 “Multiply Resonant Wideband Transducer Apparatus,” 9/27/05

6,734,604 “Multimode Synthesized Beam Transduction Apparatus,” 5/11/04

6,654,316 “Single-Sided Electro-Mechanical Transduction Apparatus,” 11/25/03

4,443,731 "Hybrid Piezoelectric Magnetostrictive Transducer," 4/17/96

5,184,332 "Multiport Underwater Sound Transducer," 2/2/93

5,047,683 "Hybrid Transducer," 9/10/91

4,864,548 "Flextensional Transducer," 9/5/89

4,845,688 "Electro-Mechanical Transduction Apparatus," 7/4/89

4,754,441 "Directional Flextensional Transducer,"6/28/88

4,742,499 "Flextensional Transducer," 5/3/88

4,642,802 "Elimination of Magnetic Biasing," 2/20/87

4,438,509 "Transducer with Tensioned Wire Precompression," 3/20/84

4,332,986 "Speaker System Employing Passive Radiator," 6/1/82

4,326,275 "Directional Transducer" 4/20/82

3,933,219 "Speaker System," 1/20/76

3,924,259 "Array of Multicellular Transducer," 12/2/75

3,378,814 "Directional Transducer," 4/16/68

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