Perpetual calendar
USD408446S · kind S · design
1Cited by
9References
1Claims
0Family size
Inventor
Key dates
| Filing date | Aug 3, 1998 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | Apr 20, 2013 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.