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This is an instance in which the original patent document by which we found the classification does not display the nature of the classification. This classification may involve peculiarities of design and technical principle which are not at all exclusive to aeronautics.
This wiki has 4 patents in category "AT 37c".
Patents in category AT 37c
- Patent AT-1909-47518 (English title: Helical ground anchor, Inventors: Gustav Behrens, Supplementary to patent: Patent DE-1909-06-23 Gustav Behrens, Filing date: 1909-12-27)
- Patent AT-1910-49127 (English title: Gate for the entrance openings of large halls, especially for aircraft, Filing date: 1910-03-10)
- Patent AT-1912-63425 (English title: Multi-part slide gate, especially for aircraft hangars, Filing date: 1912-04-03)
- Patent AT-1915-78567 (English title: Multi-part slide gate, especially for aircraft hangars, Supplementary to patent: Patent AT-1912-63425, Filing date: 1915-07-14)
|Enclosing categories||AT 37, Austrian patent classifications, Patent classification systems|