Metric unit conversion aid

Details Metric unit conversion aid Metric unit conversion aid

1976-01-14

1977-05-10

Aegerter, Richard E.

Geometrical instruments

Miscellaneous

Light direction

33174B, 35 31R, G09B 1902, G06G 100

Patent

active

040219232

ABSTRACT:
A template incorporating a plurality of openings forming columns and rows having a predetermined alignment and identified by annotations representing metric system units to facilitate use of the device for automatic unit conversion during the performance of mathematical calculations involving dissimilar metric unit quantities.

REFERENCES:
patent: 808511 (1905-12-01), Cochran
patent: 1662882 (1928-03-01), Clark
patent: 3564718 (1971-02-01), Goode
patent: 3787988 (1974-01-01), Nakajima

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