Number | Name | Date | Kind |
---|---|---|---|
2744714 | Parke | May 1956 | |
3087586 | Gray | Apr 1963 | |
3203151 | Branfsord, Jr. | Aug 1965 | |
3394507 | Dohe | Jul 1968 | |
3407547 | Dohe et al. | Oct 1968 | |
3668827 | Schwartz | Jun 1972 | |
3778939 | Nelsson | Dec 1973 | |
3782048 | Corman | Jan 1974 | |
3828495 | Law | Aug 1974 | |
3847489 | Van Riper | Nov 1974 | |
4231197 | Caplan et al. | Nov 1980 | |
4441300 | Varon et al. | Apr 1984 |
Number | Date | Country |
---|---|---|
2659818 | Oct 1977 | DEX |
3003176 | Aug 1981 | DEX |
Entry |
---|
Ceiling Dynamics, U.S. Gypsum Company, 1979. |