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Patent:US676740


Brevetto:US 676740
Titolo:Calculating or like scale
Data:18.03.1899
Luogo:Roma, Italien
Nazione:Stati Uniti
Persona:Farini, Placida
Ditta:
Link interni:
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(without guarantee)
 US676740 (espacenet),  US676740 (uspto)


Letters Patent in the Kingdom of Italy, dated August 19, 1898, No. 49,015

The present invention relates to a triangular scale for drawing purposes which provides a means of graphically solving several geometrical problems of practical importance to engineers, architects, mathematicians, designers, students, and others.