Number | Name | Date | Kind |
---|---|---|---|
3478660 | Land | Nov 1969 | |
3744385 | Burgarella et al. | Jul 1973 | |
3791278 | Biber et al. | Feb 1974 | |
3832722 | Douglas | Aug 1974 | |
3942183 | Whiteside | Mar 1976 | |
3977014 | Norris | Aug 1976 | |
4040072 | Shenk | Aug 1977 | |
4040072 | Johnson et al. | Aug 1977 | |
4148574 | Johnson | Apr 1979 | |
4174893 | Burgarella et al. | Nov 1979 | |
4188103 | Biber et al. | Feb 1980 | |
4192587 | La Rocque et al. | Mar 1980 |
Entry |
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U.S. Patent Application Ser. No. 42,912 filed May 29, 1979 by Coppa, R. J. |