| Number | Date | Country | Kind |
|---|---|---|---|
| 60-289818 | Dec 1985 | JPX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 3749833 | Rait | Jul 1973 | |
| 3800076 | Koizumi | Mar 1974 | |
| 4574317 | Scheible | Mar 1986 | |
| 4652743 | Harano | Mar 1987 |
| Number | Date | Country |
|---|---|---|
| 0039170 | Apr 1981 | EPX |
| 0076700 | Oct 1982 | EPX |
| 0098745 | Jun 1983 | EPX |
| 2716976 | Apr 1977 | DEX |
| 3033520 | Sep 1980 | DEX |
| 3339256 | Oct 1983 | DEX |
| 34273 | Apr 1981 | JPX |
| 1557881 | Jun 1977 | GBX |
| 2010633 | Dec 1978 | GBX |
| 2015846 | Feb 1979 | GBX |
| 2069291 | Feb 1981 | GBX |
| 2082874 | Aug 1981 | GBX |
| Entry |
|---|
| Scanning Typewriter, by Dattilo and Queener, IBM Technical Disclosure Bulletin, vol. 20, No. 4, Sep. 1977, p. 1299. |