The broken lines depict unclaimed environmental subject matter.
The broken lines depict unclaimed environmental subject matter.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2959711 | Parmater et al. | Nov 1960 | A |
| D201913 | Raymond | Aug 1965 | S |
| D202375 | Taylor | Sep 1965 | S |
| D207552 | Perkins | May 1967 | S |
| D217287 | Schwartz | Apr 1970 | S |
| D225005 | Greene | Oct 1972 | S |
| 3781656 | Glew | Dec 1973 | A |
| D232120 | Schwartz | Jul 1974 | S |
| D244364 | Rasmussen | May 1977 | S |
| D248630 | Maxwell et al. | Jul 1978 | S |
| D249484 | Shumway et al. | Sep 1978 | S |
| 4117395 | Redfield | Sep 1978 | A |
| D258274 | Greenlee et al. | Feb 1981 | S |
| D261115 | Greenlee et al. | Oct 1981 | S |
| D264191 | Jondrow | May 1982 | S |
| D276850 | McCollum | Dec 1984 | S |
| 4594886 | Chen | Jun 1986 | A |
| D290348 | Frees et al. | Jun 1987 | S |
| D292893 | Bakula et al. | Nov 1987 | S |
| D331710 | McKinnon et al. | Dec 1992 | S |
| D341302 | Ware | Nov 1993 | S |
| D345117 | Pacetti et al. | Mar 1994 | S |
| 20030057933 | Shaland et al. | Mar 2003 | A1 |