in which the sound is perpendicular to the current crossing the transducer material

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Patents Grantslast 30 patents

Information Patent Grant
2168569
- Patent number 2,168,569
- Issue date Aug 8, 1939
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
2140859
- Patent number 2,140,859
- Issue date Dec 20, 1938
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1865210
- Patent number 1,865,210
- Issue date Jun 28, 1932
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1829203
- Patent number 1,829,203
- Issue date Oct 27, 1931
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1748928
- Patent number 1,748,928
- Issue date Feb 25, 1930
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1711410
- Patent number 1,711,410
- Issue date Apr 30, 1929
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1634210
- Patent number 1,634,210
- Issue date Jun 28, 1927
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1616414
- Patent number 1,616,414
- Issue date Feb 1, 1927
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1493415
- Patent number 1,493,415
- Issue date May 6, 1924
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1459005
- Patent number 1,459,005
- Issue date Jun 19, 1923
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
1354229
- Patent number 1,354,229
- Issue date Sep 28, 1920
- H04 - ELECTRIC COMMUNICATION TECHNIQUE