USPC 104/23.1
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Patent category USPC 104 is for railways. Subcategories:
- 104/22 Balloon
- 104/23.1 Fluid supported car or simulated aerial vehicle[1]
These inventions involve a railroad track.
References
- ↑ Source: Schedule for class 104 at USPTO
- Patents in this category
- Patent US-1895-536174 (Applicant person: Charles E. Olsen)
- Patent US-1910-975196
| Enclosing categories | USPC 104 |
|---|---|
| Subcategories | |
| Keywords | Track |
| Start year | |
| End year |
