CH 4f
Jump to navigation
Jump to search
The Swiss patent category system of the time had a class 4 for Constructions au-dessus du sol, and a subclass 4f for Bâtisses de tous genres.
This wiki has 1 patents in category "CH 4f".
Patents in category CH 4f
- Patent CH-1913-65483 (English title: Airship port, actually a system featuring two independently rotable airship hangars, Inventors: Wilhelm Kauertz, Supplementary to patent: Patent DE-1913-301564, Filing date: 1913-07-01)
| Enclosing categories | Swiss patent classifications, 1908-1920 |
|---|---|
| Subcategories | |
| Keywords | Infrastructure, Hangars |
| Start year | 1890 |
| End year | 1907 |
