Outdoor fish aquarium
US5154136A · kind A · utility
1Cited by
11References
12Claims
0Family size
Inventor
Key dates
| Filing date | Nov 21, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Nov 21, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/81
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An outdoor fish aquarium has an upper and lower part, where the lower part is a cylindrical well where the fish would be safe from freezing weather. The aquarium is designed so that the water in the well would not all freeze in the coldest parts of the year, so that the fish could survive in the well when the rest of the water in the upper part is frozen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.