| Number | Name | Date | Kind |
|---|---|---|---|
| D310062 | Harmon | Aug 1990 | |
| 1777071 | Burnham | Sep 1930 | |
| 1777073 | Burnham | Sep 1930 | |
| 1798364 | Burnham | Mar 1931 | |
| 1899658 | Ainsworth | Feb 1933 | |
| 2523082 | Wilson | Sep 1950 | |
| 2945912 | Imhof | Jul 1960 | |
| 3073891 | Barengoltz | Jan 1963 | |
| 3129276 | Easley et al. | Apr 1964 | |
| 3551587 | Propst | Dec 1970 | |
| 3-583815 | Leeds et al. | Apr 1961 | |
| 3627906 | Kurz et al. | Dec 1971 | |
| 3767976 | Graybill et al. | Oct 1973 | |
| 3784733 | Farmer et al. | Jan 1974 | |
| 4009141 | Nichols et al. | Feb 1977 | |
| 4016382 | Roth | Apr 1977 | |
| 4123618 | Cushing et al. | Oct 1978 | |
| 4582723 | Markert et al. | Apr 1986 | |
| 4584429 | Raketti et al. | Apr 1986 | |
| 4760216 | Thiel et al. | Jul 1988 | |
| 4791247 | Cacalloro et al. | Dec 1988 | |
| 4865559 | Clabburn | Sep 1989 | |
| 4886945 | Roberts et al. | Dec 1989 | |
| 4965407 | Hamm | Oct 1990 |
| Entry |
|---|
| Descriptive Bulletin 1611.10, Elliot Molding & Components, 1987. |
| Apparatus Catalogue 280-05, McGraw-Edison Company, Power Systems Division, Aug. 1978. |