AT 77
The AT 77 category was closely analogous and perhaps identical to DE 77. Presumably Austria adopted subcategories of category 77 a little after Germany did, and presumably they were the same subcategories. We'll test that in data. The start year we see in data is 1899, so we'll pencil that in below. Once the subcategories are adopted, there probably were no more patents directly in this AT 77 categories, and that appears to have happened in or by 1901. We'll try to find the law or statement of practice that strengthens our statements about how long this AT 77 was itself a category to which patents were assigned.
As of 1901, AT 77 had these subcategories:
- (77a) Sport, (77b) Spiele (games), (77c) Volksbelustigung (popular entertainment), and (77d) Luftschiffahrt ("Aeronautics")
In this wiki we are not generally interested in the cases outside 77d, though there will naturally be some.
Enclosing categories | Austrian patent classifications |
---|---|
Subcategories | AT 77a, AT 77b, AT 77c, AT 77d |
Keywords | |
Start year | 1899 |
End year | 1899 |
This wiki has 4 patents in category "AT 77".
Patents in category AT 77
- Patent AT-1898-2834 (English title: Aircraft with multiple motors arranged separately, Inventors: Ferdinand von Zeppelin)
- Patent AT-1899-1616 (English title: Maneuverable aircraft, Inventors: Heinrich Suter, Supplementary to patent: Patent CH-1899-18666, Filing date: 1899-01-23)
- Patent AT-1899-6421 (English title: Dirigible airship, Inventors: Franz Johann Karafiat, Filing date: 1899-01-31)
- Patent AT-1899-Ganea (English title: Dirigible airship (flying machine), Inventors: Elias Ganea, Filing date: 1899-02-10)