Number | Name | Date | Kind |
---|---|---|---|
1269616 | LeBozec | Jun 1918 | |
1424461 | Frankforter | Aug 1922 | |
2313169 | Penick et al. | Mar 1943 | |
2633739 | Potts et al. | Apr 1953 | |
3012433 | Blafield | Dec 1961 | |
3181367 | Parilla | May 1965 | |
3386466 | Brunsing | Jun 1968 | |
3969923 | Howell | Jul 1976 |
Entry |
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"Tube Leak Detector" Description of Device and Its Operation; Falls Machine Company, Akron, Ohio. |