CA 244/19
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CA 244/19 is a Canadian patent category for helicopters with an "plural sustaining rotors."[1][2][3]
References
This wiki has 1 patents in category "CA 244/19".
Patents in category CA 244/19
- Patent CA-1909-125915 (English title: Aeronautic apparatus, Inventors: George Alphonso Metcalf, Supplementary to patent: Patent US-1909-908794 • Patent FR-1909-398288, Filing date: 1909-12-13)
| Enclosing categories | CA 244/15 |
|---|---|
| Subcategories | |
| Keywords | Helicopter, Sustention |
| Start year | |
| End year |
