Number | Name | Date | Kind |
---|---|---|---|
3907816 | Winkelmann et al. | Sep 1975 | |
4046896 | Winkelmann et al. | Sep 1977 | |
4078063 | Lumma et al. | Mar 1978 | |
4376772 | Saari et al. | Mar 1983 | |
4381302 | Huff et al. | Apr 1983 | |
4442103 | Saari | Apr 1984 | |
4456604 | Saari | Jun 1984 |
Entry |
---|
Ser. No. 439,698, by Huff et al. |
Ser. No. 436,753, by Saari. |