USD239107S - - Google Patents
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- Publication number
- USD239107S USD239107S US D239107 S USD239107 S US D239107S
- Authority
- US
- United States
- Prior art keywords
- circuits
- parallel
- educational board
- view
- educational
- Prior art date
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' De 239,107 Patented M ar. 9, 1976 PARALLEL RL/RC CIRCUITS EDUCATIONAL BOARD Dou C. Covert, Royal Oak, Mich, signer to erox Corporation, Stamford, nn.
Filed May 30, 1974, Ser. No. 474,482
Term of patent 14 years Int. Cl. Dl9-(J7 US. Cl. l)l962 Des. 239,107
Page 2 of 2 FIG. 1 is a top right front perspective view of a parallel RL/RC circuits educational board showing my new design; and
FIG. 2 is a bottom left from perspective view thereof.
The rear of the educational board not shown is plain and unornamented.
I claim:
The ornamental design of a parallel RL/RC circuits educational board, substantially as shown.
References Cited UNITED STATES PATENTS Kasamatsu 35-19 A Roelofs 3S-19 A Meuche 35-19 A Thompson 35--19 A Kruse 3519 A NELSON C. HOLTJE, Primary Examiner
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