| All Patents in class 277/397 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 2,448,195 | Aug. 31, 1948 | C.F. Schnuck | Cane Mill | sugar cane apparatus |
| 2,501,984 | Mar. 28, 1950 | L.D. Alward | Shaft Seal | shaft seals |
| 2,756,080 | Jul. 24, 1956 | H.A. Andresen, R.H. Andresen | Rotary Seal and Clutch Assembly | shaft seals |
| 3,020,052 | Feb. 06, 1962 | R.J. Gits | Shaft Seal | shaft seals |
| 3,093,381 | Jun. 11, 1963 | G. Schultz | Shaft Seal | shaft seals |
| 3,116,066 | Dec. 31, 1963 | W.J. Koppius | Mating Ring and Seal | shaft seals |
| 3,120,959 | Feb. 11, 1964 | R.H. Andresen, H. Jensen | Unitized Face Type Rotary Seal | shaft seals |
| 3,179,425 | Apr. 20, 1965 | R.H. Andersen | Rotary Seal Employing a Flexible Sleeve | shaft seals |
| 3,191,945 | Jun. 29, 1965 | R.H. Andresen | Rotary Seal With Supporting Sleeve | shaft seals |
| 3,239,232 | Mar. 08, 1966 | R.H. Andresen | Self-leveling Rotary Seal | shaft seals |
| 3,972,536 | Aug. 03, 1976 | E.C. Wahl, D.J. Warner | Rotating Shaft Seal Assembly | shaft seals |
| 4,434,988 | Mar. 06, 1984 | D.J. Warner | Shaft Seal | shaft seals |
| 4,688,807 | Aug. 25, 1987 | D.J. Warner | Shaft Seal | shaft seals |
