The broken lines in the drawings represent unclaimed environmental subject matter.
The broken lines in the drawings represent unclaimed environmental subject matter.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2027079 | Weiss | Jan 1936 | A |
| 2040241 | Cortilet | May 1936 | A |
| 2078018 | Powell | Apr 1937 | A |
| 2260428 | Barr et al. | Oct 1941 | A |
| 2502561 | Ebert | Apr 1950 | A |
| 2504179 | Chemlinski | Apr 1950 | A |
| 2527028 | Myers | Oct 1950 | A |
| 2549023 | Shinoda | Apr 1951 | A |
| 2748927 | Crane, Jr. | Jun 1956 | A |
| 3201024 | Brokop | Aug 1965 | A |
| 3227266 | Soma | Jan 1966 | A |
| 3339724 | Hickin | Sep 1967 | A |
| 3406816 | Green et al. | Oct 1968 | A |
| 3487921 | Barth et al. | Jan 1970 | A |
| 3533503 | Keats et al. | Oct 1970 | A |
| 3901383 | Witt | Aug 1975 | A |
| 3927761 | Boyle | Dec 1975 | A |
| 3935944 | Wilson et al. | Feb 1976 | A |
| D244430 | Larkin | May 1977 | S |
| D251360 | Collin | Mar 1979 | S |
| 4160570 | Bridges | Jul 1979 | A |
| D263121 | Lowry | Feb 1982 | S |
| 4396115 | Watson | Aug 1983 | A |
| 4641746 | Dornbusch et al. | Feb 1987 | A |
| 4717022 | Combs | Jan 1988 | A |
| D295796 | Wadsworth et al. | May 1988 | S |
| 5048690 | Zimmerman | Sep 1991 | A |
| 5186319 | Ting | Feb 1993 | A |
| 5636746 | McQueeny | Jun 1997 | A |
| 6415928 | Giacci | Jul 2002 | B1 |
| 6422453 | Wang | Jul 2002 | B1 |
| D461124 | Ma | Aug 2002 | S |
| 6793070 | Dye | Sep 2004 | B2 |
| D509729 | Proudfit | Sep 2005 | S |
| 6988614 | Hemingway et al. | Jan 2006 | B2 |
| 7317573 | Billen | Jan 2008 | B2 |
| 7337909 | Morgan | Mar 2008 | B1 |
| 20060266672 | Young | Nov 2006 | A1 |
| 20070227943 | Foushee | Oct 2007 | A1 |