Patent Grant
D430774
| Number | Name | Date | Kind |
|---|---|---|---|
| D104875 | Newnham et al. | Jun 1937 | |
| D107985 | Allenby et al. | Jan 1938 | |
| D121124 | Preston | Jun 1940 | |
| D143981 | Maxson, Jr. et al. | Feb 1946 | |
| D145940 | Kessel | Nov 1946 | |
| D148095 | Snyder et al. | Dec 1947 | |
| D152158 | Karstadt | Dec 1948 | |
| D179712 | Waltman | Feb 1957 | |
| D211041 | Peterson | May 1968 | |
| D226019 | Morris | Jan 1973 | |
| D309081 | Thomas | Jul 1990 | |
| D310005 | Precht | Aug 1990 | |
| D321811 | Littmann | Nov 1991 | |
| D322008 | Littmann | Dec 1991 | |
| D329165 | Doggett | Sep 1992 | |
| D329166 | Doggett | Sep 1992 | |
| D336405 | Maass | Jun 1993 | |
| D338593 | Maass | Aug 1993 | |
| D338802 | Maass | Aug 1993 | |
| D345077 | Maass | Mar 1994 | |
| D345888 | Joss et al. | Apr 1994 | |
| D362587 | Littmann | Sep 1995 | |
| D362783 | Cruz | Oct 1995 | |
| D364532 | Seiffert | Nov 1995 | |
| D367400 | Viemeister et al. | Feb 1996 | |
| D387244 | Ivy et al. | Dec 1997 | |
| D396991 | Lallemand | Aug 1998 | |
| D400049 | Wanat et al. | Oct 1998 | |
| D400758 | Hippen et al. | Nov 1998 | |
| 2048184 | Dormeyer | Jul 1936 | |
| 2192843 | Bean | Mar 1940 | |
| 2192845 | Bean | Mar 1940 | |
| 2325434 | Stiles | Jul 1943 | |
| 2348341 | Gough | May 1944 | |
| 2477150 | Snyder et al. | Jul 1949 | |
| 2554506 | Schwarz | May 1951 | |
| 2637824 | Kessel | May 1953 | |
| 4922464 | Kamprath | May 1990 | |
| 5316382 | Penaranda et al. | May 1994 | |
| 5522659 | Penaranda et al. | Jun 1996 |
