Number | Date | Country | Kind |
---|---|---|---|
54-47417 | Apr 1979 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3793721 | Wakefield et al. | Feb 1974 | |
3881242 | Nuttall et al. | May 1975 | |
4013489 | Oldham | Mar 1977 | |
4039358 | Kitajima et al. | Aug 1977 | |
4109372 | Geffken | Aug 1978 | |
4221045 | Godejahn | Sep 1980 |
Entry |
---|
Soderman, IBM Technical Disclosure Bulletin, vol. 21, No. 3, Aug. 1978, pp. 1127 and 1128. |