Number | Name | Date | Kind |
---|---|---|---|
2116075 | Lenhart | May 1938 | |
2851553 | Grostick | Sep 1958 | |
2909766 | Bozich | Oct 1959 | |
3210493 | Lau | Oct 1965 | |
3210495 | Lau | Oct 1965 | |
3322403 | Murphy | May 1967 | |
3436059 | Donaldson | Apr 1969 | |
3510861 | McIver et al. | May 1970 | |
3542982 | Gruber | Nov 1970 | |
3721971 | Gruber | Mar 1973 | |
3818159 | Evans et al. | Jun 1974 | |
3941956 | Delin et al. | Mar 1976 | |
4095064 | Fleckenstein | Jun 1978 | |
4147906 | Levine | Apr 1979 | |
4211966 | Sweet | Jul 1980 |
Entry |
---|
Monitor Mfg. Co.--sales brochure, "Monitor Automatic Level Indicators" (1976), pp. 1, 2 and 9. |