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| Patents Granted on 1990-03-06 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,905,366 | Mar. 06, 1990 | D.J. Warner | Method of Installing a Positive Bearing Housing Seal | shaft seals | |
| 4,906,008 | Mar. 06, 1990 | D.J. Warner | Mechanical Seal | shaft seals | |