USD239110S - - Google Patents
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- USD239110S USD239110S US D239110 S USD239110 S US D239110S
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- United States
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- board
- rectifier
- filter
- educational
- united states
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United States Patent 239,11"
Patented Mar. 9, 1976 RECTIFIER/FILTER EDUCATIONAL BOARD Douglas C. Covert, Royal Oak, Mich., assignor to Xerox Corporation, Stamford, Conn.
Filed May 30, 1974, Scr. No. 474.500
Term of patent 14 years Int. Cl. Dl9-07 US. Cl. D19--62 Des. 239,110
Page 2 of 2 eeooo o o o e o e Q FIG. 1 is a top right front perspecive view of a rectifier/ References Cited filter educ' ltional board showing my new design; and UNITED STATES PATENTS FIG. 2 IS a bottom left front perspective View thereof. The rear of the educational board not shown is plain 3345573 11/1974 Kasamatsu 35 19 A and unomameme 3,546,793 12/1970 Roelofs 3519 A I claim; 3,008,245 11/1961 Meuche 3519 A The ornamental design of a rectifier/filter educational 2,826,628 3/1958 Kruse 35 19 A board, substantially as shown. OTHER REFERENCES RCA Electronics Trainers," received July 16, 1958, p. 6, board bottom left.
NELSON C. HOLTJE, Primary Examiner
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