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| All Patents in class 277/393 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,824,760 | Feb. 25, 1958 | R.J. Gits | Diaphragm Type Shaft Seal | ||
| 2,881,015 | Apr. 07, 1959 | E.C. Wahl | Shaft Seal Means and Method | ||
| 3,020,052 | Feb. 06, 1962 | R.J. Gits | Shaft Seal | ||
| 3,191,945 | Jun. 29, 1965 | R.H. Andresen | Rotary Seal With Supporting Sleeve | ||