Number | Date | Country | Kind |
---|---|---|---|
3215249 | Apr 1982 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2494440 | Haynes | Jan 1950 | |
3297873 | Hovnanian et al. | Jan 1967 | |
3520614 | Goldstein | Jul 1970 | |
3811777 | Chance | May 1974 | |
3822941 | Roche et al. | Jul 1974 | |
3920334 | Steichen et al. | Nov 1975 | |
4099872 | White | Jul 1978 |
Number | Date | Country |
---|---|---|
1291533 | Mar 1969 | DEX |
2656417 | Jul 1977 | DEX |
3001053 | Jul 1981 | DEX |
2239170 | Feb 1975 | FRX |
Entry |
---|
"Spectrum Analyzer," R. W. Kern, IBM Technical Disclosure Bulletin, vol. 18, No. 9, Feb. 1976, p. 2845. |