| Number | Name | Date | Kind |
|---|---|---|---|
| 2877453 | Mendenhall, Jr. | Mar 1959 | |
| 3771192 | Zaleski | Nov 1973 | |
| 3863076 | Steele et al. | Jan 1975 | |
| 3936814 | Muller-Girard et al. | Feb 1976 | |
| 3978461 | DeLime, III | Aug 1976 | |
| 4004288 | Webb, Jr. | Jan 1977 | |
| 4075614 | White | Feb 1978 | |
| 4186389 | Flittie | Jan 1980 | |
| 4186390 | Enemark | Jan 1980 | |
| 4219806 | Enemark | Aug 1980 | |
| 4245429 | Katzman et al. | Jan 1981 | |
| 4302753 | Conforti | Nov 1981 | |
| 4316179 | Bliss et al. | Feb 1982 | |
| 4316184 | Nagel | Feb 1982 | |
| 4404550 | Shaw | Sep 1983 | |
| 4423411 | van der Walt et al. | Dec 1983 | |
| 4432041 | Pfisterer et al. | Feb 1984 | |
| 4456907 | Johnson | Jun 1984 | |
| 4531114 | Topol et al. | Jul 1985 | |
| 4659919 | Price | Apr 1987 | |
| 4740186 | Sirota | Apr 1988 |
| Number | Date | Country |
|---|---|---|
| 2184546 | Jun 1987 | GBX |
| Entry |
|---|
| "Heath's HERO-1 Robot"; Byte Publications Inc., p. 86, Jan. 83; Leininger. |