Number | Name | Date | Kind |
---|---|---|---|
3536862 | Weingartner | Oct 1970 | |
3560668 | Warning | Feb 1971 | |
4127751 | Kinoshita | Nov 1978 | |
4151378 | Watson | Apr 1979 | |
4151777 | Sugiyama et al. | May 1979 | |
4168762 | Griffin, Jr. | Sep 1979 | |
4174469 | Kusuyama | Nov 1979 | |
4340787 | Gorike | Jul 1982 |
Number | Date | Country |
---|---|---|
2418060 | Oct 1975 | DEX |
53-92119 | Aug 1978 | JPX |
Entry |
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"New Audio Test Report-Electro-Voice Unidirectional Mike", Electronics World, p. 114. |
"A New Cardioid Microphone", Tele Tech and Electronic Industries, Oct. 1955, pp. 70-72. |