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Patent:US6877262
| Patent: | US 6877262 |
| Title: | Perpetual Calendar |
| Date: | 12.04.2005 |
| Place: | |
| Country: | USA |
| Person: | Bianco, Ronald |
| Company: | |
| Internal Links: | Datumsrechner |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US6877262 (espacenet), US6877262 (uspto) |
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