USPC 416/128
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USPC 416/129 is a patent subclass for devices with multiple impellers (propellers) on the same axis which rotate in opposite directions from one another.[1]
References
- ↑ Description of USPC 416/129 at uspto.gov
This wiki has 7 patents in category "USPC 416/128".
Patents in category USPC 416/128
- Patent US-1880-224628 (English title: Windmill, Inventors: J. Oscar Baird, Filing date: 1879-11-21)
- Patent US-1893-493533 (English title: Wind wheel, Inventors: Benjamin J. Sykes, Filing date: 1892-06-10)
- Patent US-1903-737241 (English title: Churn, Inventors: James Scott Hudson, Filing date: 1903-04-28)
- Patent US-1905-790407 (English title: Steam turbine, Inventors: Johann Stumpf, Filing date: 1903-09-08, Applicant firm: General Electric Co.)
- Patent US-1907-844454 (English title: Duplex wind-motor, Inventors: Orlando Kirkham, Filing date: 1906-09-17)
- Patent US-1913-1091887 (English title: Churn, Inventors: Dee P Long, Filing date: 1913-04-05)
- Patent US-1919-1297084 (English title: Windmill, Inventors: William C Brownell, Filing date: 1917-10-22)
| Enclosing categories | USPC 416/124 |
|---|---|
| Subcategories | USPC 416/129 |
| Keywords | Propellers |
| Start year | |
| End year |
