US Patent: 5,945X
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| Calendars
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Patentee:
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| John L. Dagg (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
May 04, 1830 |
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Joel Havens
X-Patents
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Description: |
| Some records list the assignee's name as John O. Hara.
Listed in A List of Patents Issued by the United States, from 1790 to 1847, 1847, pgs. 321 & 454.
Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.
"For a Perpetual Calender; John O'Hara, Philadelphia, as assignee of the inventor, John L. Dagg, Philadelphia, "Pennsylvania, May 4.
This calender may be formed upon a flat surface, in a manner similar to such as have been previously patented, but Mr. O'Hara, the assignee of the inventor, attaches it to an ever-pointed pencil case, in the manner in which the days of the month have heretofore been attached. By its aid the day of the week on which any event happened, may be found with very great facility, the date being given. The arrangement is neat and simple, and if it is not a thing of very great utility, it is calculated to resolve inquiries which are frequently interesting. The particular arrangement of the words and figures would require a diagram for their explanation; we refer the curious, therefore, to the article itself, which, whilst it may satisfy them, will serve the manufacturer, and encourage the arts."
Journal of the Franklin Institute, 1830, V6, pg. 74.
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