Reading pacer

Details Reading pacer Reading pacer

1989-03-02

1992-09-22

Holtje, Nelson C.

Office supplies; artists and teachers materials

Teaching material

Sensory feedback, e.g., audio-visual teaching machine

D16135, D19 59, D19 65

Patent

active

D03296628

REFERENCES:
patent: D171904 (1954-04-01), Macaluso, Jr.
patent: D291448 (1987-08-01), Tai-Kam
patent: 2384528 (1945-09-01), Brandt et al.
patent: 4457720 (1984-07-01), Spong
Optical Journal-Review .COPYRGT.1962 see p. 70 Magnifier-upper right.
Edroy Products Co. Inc., see "Featherweight" upper left.
Office Products Inc. .COPYRGT.1978 see p. 248 Bausch & Lomb #81-33-86 upper left.

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