The broken lines in the drawings depict unclaimed environmental subject matter.
The broken lines in the drawings depict unclaimed environmental subject matter.
| Number | Name | Date | Kind |
|---|---|---|---|
| D58194 | Levasseur | Jun 1921 | S |
| D159129 | Andrews | Jun 1950 | S |
| 2656861 | Verret | Oct 1953 | A |
| D202197 | Beckman | Sep 1965 | S |
| 3290108 | Beckman et al. | Dec 1966 | A |
| D208709 | Barecki | Sep 1967 | S |
| 3758182 | Barecki et al. | Sep 1973 | A |
| 4884513 | Newhouse et al. | Dec 1989 | A |
| D311833 | Newhouse | Nov 1990 | S |
| D312541 | Wright | Dec 1990 | S |
| D319935 | Heidmann | Sep 1991 | S |
| D330302 | Heidmann | Oct 1992 | S |
| D337675 | Koguma | Jul 1993 | S |
| D345266 | Koguma | Mar 1994 | S |
| D352406 | Scheffers | Nov 1994 | S |
| D352845 | Hellwig et al. | Nov 1994 | S |
| D360091 | Hassel et al. | Jul 1995 | S |
| D364281 | Eason | Nov 1995 | S |
| D370579 | Simon | Jun 1996 | S |
| D412256 | Gutgsell | Jul 1999 | S |
| D439448 | DeJule | Mar 2001 | S |
| 6681704 | Brookhiser | Jan 2004 | B1 |