Patent Grant
D330959
| Number | Name | Date | Kind |
|---|---|---|---|
| D166005 | Summerhill | Feb 1952 | |
| 1274152 | Ellis | Jul 1918 | |
| 1738096 | Cole | Dec 1929 | |
| 1866887 | Gleason et al. | Jul 1932 | |
| 2222142 | Doty | Nov 1940 | |
| 2385514 | Hawkins | Sep 1945 | |
| 2710106 | Hanson | Jun 1955 | |
| 2820643 | Cohn | Jan 1958 | |
| 2827190 | Spitzmesser | Mar 1958 | |
| 2922658 | Manahan | Jan 1960 | |
| 2949314 | Strohmaier | Aug 1960 | |
| 3075662 | Da Prato et al. | Jan 1963 | |
| 3642301 | Crawford | Feb 1972 | |
| 3661414 | Roth | May 1972 | |
| 3791542 | Mauch | Feb 1974 | |
| 4335990 | Apter et al. | Jun 1982 | |
| 4653765 | Smalley et al. | Mar 1987 | |
| 4756540 | Crawford | Jul 1988 |
