Color comparator for testing swimming pools
USD247821S · kind S · design
6Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1976 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | May 2, 1992 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.