Patent Grant
D305455
| Number | Name | Date | Kind |
|---|---|---|---|
| D189180 | Young | Nov 1960 | |
| D190314 | Nelson | May 1961 | |
| D209186 | Mason | Nov 1967 | |
| D226763 | Rauh | Apr 1973 | |
| D248769 | Jetter | Aug 1978 | |
| D265118 | Fleischmann et al. | Jun 1982 | |
| D277696 | Doman et al. | Feb 1985 | |
| 1937312 | Brotz | Nov 1933 | |
| 2059120 | Kreuzer et al. | Oct 1936 | |
| 2271837 | Fredrickson et al. | Feb 1942 | |
| 2477478 | Donahue | Jul 1949 | |
| 2607045 | Morris | Aug 1952 | |
| 2910704 | Kinsey et al. | Nov 1959 | |
| 3121879 | Young | Feb 1964 | |
| 3835484 | Kato | Sep 1974 | |
| 3860977 | Politz | Jan 1975 | |
| 4085469 | Petursson | Apr 1978 | |
| 4089230 | Nelson | May 1978 | |
| 4352213 | Watts | Oct 1982 | |
| 4744108 | Schmidt | May 1988 |
