Number | Date | Country | Kind |
---|---|---|---|
49-63441 | Jun 1974 | JA |
Number | Name | Date | Kind |
---|---|---|---|
3899692 | Caswell | Aug 1975 |
Number | Date | Country |
---|---|---|
707,688 | Apr 1954 | UK |
682,864 | Nov 1952 | UK |
Entry |
---|
IBM Tech. Disclre. Bulletin, High-Voltage Switch Utilizing Boot Strapping, A. Stritt, vol. 12 No. 7 12/69, p. 1059. |