Number | Name | Date | Kind |
---|---|---|---|
1440264 | Arn | Dec 1922 | |
2716812 | Noonan | Sep 1955 | |
3177583 | Fischer et al. | Apr 1965 | |
3310872 | Dowdell | Mar 1967 | |
3372479 | Fischer | Mar 1968 | |
3670411 | Peters | Jun 1972 | |
3733699 | Bock | May 1973 | |
3834215 | Lemley | Sep 1974 | |
3837076 | Good, Jr. | Sep 1974 | |
3893237 | Jahnke | Jul 1975 | |
4031619 | Gregory | Jun 1977 | |
4057897 | Seymour | Nov 1977 | |
4285126 | Orwin | Aug 1981 | |
4526076 | Hogan | Jul 1985 | |
4707918 | Smith et al. | Nov 1987 | |
4949461 | van der Merwe et al. | Aug 1990 |
Number | Date | Country |
---|---|---|
1017299 | Dec 1952 | FRX |
722160 | Jan 1955 | GBX |
Entry |
---|
"Electrical World", p. 70, Mar. 1964. |