Patent applications and USPTO patent grants for AB Centralsug.The latest application filed is for "valve for a central suction system".
Patent | Date |
---|---|
Valve For A Central Suction System Grant 3,754,564 - Naumburg , et al. August 28, 1 | 1973-08-28 |
Flap Valve For Suction Apparatus Grant 3,672,630 - Naumburg , et al. June 27, 1 | 1972-06-27 |
Method And Means For Suction Of Vacuum Transport Of Refuse And The Like Grant 3,583,770 - Medhammar June 8, 1 | 1971-06-08 |
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