Patent Grant
D274659
| Number | Name | Date | Kind |
|---|---|---|---|
| D90482 | Ferris | Aug 1933 | |
| D137590 | Babson et al. | Apr 1944 | |
| D178270 | Babson | Jul 1956 | |
| 3448725 | Holm et al. | Jun 1969 | |
| 3805742 | Shulick et al. | Apr 1974 | |
| 4171684 | Herr et al. | Oct 1979 | |
| 4194467 | Nielsen et al. | Mar 1980 | |
| 4198927 | Guiavarch | Apr 1980 | |
| 4362127 | Nielsen et al. | Dec 1982 |
