Number | Name | Date | Kind |
---|---|---|---|
2158613 | Loughlin | May 1939 | |
2785038 | Ferber | Mar 1957 | |
3007125 | Furbee | Oct 1961 | |
3539950 | Friebergs | Nov 1970 | |
3557266 | Chiba et al. | Jan 1971 | |
3768040 | Mason et al. | Oct 1973 | |
3906408 | Siekanowicz | Sep 1975 |
Entry |
---|
"Fabrication Processes", Microwave Journal, June 1966, p. 81. |
Number | Date | Country | |
---|---|---|---|
Parent | 567757 | Apr 1975 |