Patent Grant
D330248
| Number | Name | Date | Kind |
|---|---|---|---|
| D173790 | Chuboff | Jan 1955 | |
| 2807258 | Pennington | Sep 1957 | |
| 3768233 | Mateson | Oct 1973 | |
| 3819244 | Paulick et al. | Jun 1974 | |
| 3838579 | Ballard | Oct 1974 | |
| 4093435 | Marron et al. | Jun 1978 | |
| 4188993 | Heyn et al. | Feb 1980 | |
| 4426853 | Mitani et al. | Jan 1984 | |
| 4429735 | Nomaguchi et al. | Feb 1984 | |
| 4473108 | Jansson et al. | Sep 1984 | |
| 4491171 | Zenkner | Jan 1985 | |
| 4497361 | Hajicek | Feb 1985 | |
| 4513807 | Rose et al. | Apr 1985 | |
| 4542782 | Berner | Sep 1985 | |
| 4594860 | Coellner et al. | Jun 1986 | |
| 4596284 | Honmann | Jun 1986 | |
| 4646817 | van Ee | Mar 1987 | |
| 4688626 | Tengesdal | Aug 1987 | |
| 4711293 | Niwa et al. | Dec 1987 | |
| 4727931 | Berner | Mar 1988 | |
| 5070934 | Kucharczyk | Dec 1991 |
| Number | Date | Country |
|---|---|---|
| 748311 | Oct 1953 | GBX |
| Entry |
|---|
| Electrical Merchandising week, Sep., 1960, pp. 42-43. |
