Number | Name | Date | Kind |
---|---|---|---|
2179608 | Berg et al. | Nov 1939 | |
2256775 | Hubbell | Sep 1941 | |
2299116 | Svirskysy | Oct 1942 | |
2644357 | Farmer | Jul 1953 | |
2667139 | Campbell | Jan 1954 | |
2750601 | Houle | Jun 1956 | |
2800242 | Sauthoff | Jul 1957 | |
2855003 | Thaxton | Oct 1958 | |
2924246 | Markel | Feb 1960 | |
3326243 | Augustus | Jun 1967 | |
3491427 | Zimmerman et al. | Jan 1970 | |
3541858 | Bonczek | Nov 1970 | |
3860037 | Rowe | Jan 1975 | |
3978892 | Scodino | Sep 1976 | |
4250926 | Satterthwaite et al. | Feb 1981 | |
4345694 | Chambers | Aug 1982 |
Number | Date | Country |
---|---|---|
2843080 | Apr 1980 | DEX |
1092636 | Nov 1967 | GBX |
Entry |
---|
"F15-00-SD", General Electrical Co., pp. 18, 22 and A-44, FIGURES 9, 13, 93 and 94. |
Thaxton, Inc., "Pipe Stoppers" brochure. |
"Sealfast" MP and LP Series brochures, Mechanical Research & Design, Inc. |
Product literature, Circle Gas & Manufacturing Co. |