USPC 416/159
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US Patent Classification 416/159 was for impeller adjustment mechanisms whose "movement is effected by a power or manual actuator mounted on a part which is fixed in position relative to the impeller or working member."[1]
References
- Patents in category USPC 416/159
- Patent US-1917-1350982 (Applicant person: Alexis Beurrier • Édouard-Jean Bigourdan • Louis Lacoin, Filing date: 1917-03-24)
| Enclosing categories | USPC 416, USPC 416/147 |
|---|---|
| Subcategories | USPC 416/164, USPC 416/165 |
| Keywords | Impeller |
| Start year | |
| End year |
