Number | Name | Date | Kind |
---|---|---|---|
3621611 | Wingerter | Nov 1971 | |
3692281 | Clayton | Sep 1972 | |
3727347 | Barnes | Apr 1973 | |
3803792 | Fulton | Apr 1974 |
Number | Date | Country |
---|---|---|
2031196 | Jan 1972 | DEX |
2705375 | Jun 1976 | DEX |
1465465 | Jan 1967 | FRX |
Entry |
---|
Science and Invention, May 1926, p. 54. |