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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)
- Patent AT-1910-49127 (English title: Gate for the entrance openings of large halls, especially for aircraft)
- Patent AT-1912-63425 (English title: Multi-part slide gate, especially for aircraft hangars)
- Patent AT-1915-78567 (English title: Multi-part slide gate, especially for aircraft hangars)
|Enclosing categories||AT 37, Austrian patent classifications, Patent classification systems|