Lighting calculator

Details Lighting calculator Lighting calculator

1988-03-31

1991-06-18

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03176207

REFERENCES:
patent: D258895 (1981-04-01), Kobayashi
patent: D273303 (1984-04-01), Sakamoto
patent: D273502 (1984-04-01), Sakata
patent: D285806 (1986-09-01), Satake
patent: 4507745 (1985-03-01), Agrawal
patent: 4715011 (1987-12-01), Brittan
patent: 4744044 (1988-05-01), Stover et al.
patent: 4857898 (1989-08-01), Smith
Hong Kong Enterprise; 1/1986 p. 155; #1 SVI-1000 Economizer.

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