Number | Name | Date | Kind |
---|---|---|---|
2362372 | Halfmann | Nov 1944 | |
2527568 | Murray | Oct 1950 | |
2657356 | Mulavey | Oct 1953 | |
2910646 | Schutzner | Oct 1959 | |
2921255 | Norton | Jan 1960 | |
3958178 | Mueller et al. | May 1976 | |
4241306 | Bump | Dec 1980 | |
4439724 | Morong, III | Mar 1984 | |
4490671 | Morong, III | Dec 1984 |
Number | Date | Country |
---|---|---|
2539271 | Mar 1977 | DEX |
2019015A | Oct 1979 | GBX |
Entry |
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Dranetz Model 325 Electronic Solid-State Portable Digital Power-System Polymeter, 2-1981, pp. 1-8. |