Number | Date | Country | Kind |
---|---|---|---|
58-58987 | Apr 1983 | JPX | |
58-115396 | Jun 1983 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2169046 | Headrick | Aug 1939 | |
2314699 | Hale | Mar 1943 | |
4315190 | Peters et al. | Feb 1982 |
Number | Date | Country |
---|---|---|
10676 | Apr 1982 | JPX |
Entry |
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Royce "RCA Technical Notes"-RCA TN No. 117. |