Patent US-1907-921423
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Elongated propeller hub so blades hit the air serially not only in parallel. Not explicitly marine, nor explicitly aerial. Surprising lack of specificity there, perhaps purposefully. Refers to "cavitation" which may be a clue.
1/2 assigned to John Barnes.
- Inventor Mackaness location: St. Georges Crescent, Drummoyne, Sydney
- Assignee Barnes location: Mosman, Sydney
Sources
- Patent 921423 document and bibliographic info on espacenet
- Patent 921423 at google patents
| Year filed | 1907 |
|---|---|
| Year granted | 1909 |
| Office | US |
| Patent number | 921423 |
| Inventors | George Mackaness |
| Inventor country | AU |
| Applicant person | John Barnes, George Mackaness |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | No |
| Original title | Screw-propeller |
| English title | Screw propeller |
| Tech fields | propeller |
| Filing date | January 22, 1907 |
| Full specification filed date | |
| Application number | 1907353495 |
| Grant date | May 11, 1909 |
| Granted? | Yes |
| Publication date | |
| Supplementary to patent | |
| Related to aircraft? | Yes |
| Serial number | 353495 |
| Patent agent | |
| Assigned to | John Barnes |
| National tech categories | USPC 416/200R, USPC 416/201R, USPC 416/201A |
| IPCs | |
| CPCs | CPC B63H1/12, CPC B64C11/48 |
| Family year | 1907 |
| First filing? | Yes |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | 47193199 |
| INPADOC family ID | 43809447 |
| Number of text pages | 2 |
| Number of diagram pages | 3 |
| Number of figures | 4 |
| Number of claims |
