Number | Name | Date | Kind |
---|---|---|---|
1686161 | Liese | Oct 1928 | |
2216220 | Baker | Oct 1940 | |
2239537 | Owen | Apr 1941 | |
2318362 | Boeglen et al. | May 1943 | |
2324038 | Steele | Jul 1943 | |
2346170 | Kalkusch | Apr 1944 | |
2835623 | Vincent et al. | May 1958 | |
3234699 | Smith | Feb 1966 | |
4058943 | Sturgill | Nov 1977 | |
4774793 | Mayer | Oct 1988 |
Entry |
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PC Glass Block, Pittsburgh Corning Corporation, .COPYRGT.1988. |