Patent Grant
D320609
| Number | Name | Date | Kind |
|---|---|---|---|
| D172120 | Zuckerman | May 1954 | |
| D306222 | Lee | Feb 1990 | |
| 932703 | Henry | Aug 1909 | |
| 947636 | Degges | Jan 1910 | |
| 2093536 | Alvord | Sep 1937 | |
| 2224560 | Wentz | Dec 1940 | |
| 2541242 | Grove | Feb 1951 | |
| 2544221 | Creighton | Mar 1951 | |
| 2580744 | Edsall | Jan 1952 | |
| 2620472 | Sor et al. | Dec 1952 | |
| 2762050 | Bricker | Sep 1956 | |
| 2795793 | Sommers | Jun 1957 | |
| 2819468 | Van Dicklage | Jan 1958 | |
| 2890458 | Hammond | Jun 1959 | |
| 2891251 | Ebersole | Jun 1959 | |
| 3276035 | Jacobson | Nov 1964 | |
| 4133604 | Fuller | Jan 1979 | |
| 4446571 | Ross | May 1984 | |
| 4543667 | Garbutt | Oct 1985 | |
| 4606453 | Burns | Aug 1986 |
