Child's toy in the form of a miniature storm sewer system
US4170839A · kind A · utility
8Cited by
2References
19Claims
0Family size
Inventor
Key dates
| Filing date | Dec 30, 1977 |
| Grant date | Oct 16, 1979 |
| Priority date | — |
| Expiry date | Dec 30, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H33/42
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A child's toy in the form of a miniature, operative storm sewer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.