Patent classifications
G
PHYSICS
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G09
EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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G09F
DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
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7/00
Signs, name or number plates, letters, numerals, or symbols; Panels or boards
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G09F7/18
Means for attaching signs, plates, panels, or boards to a supporting structure
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G09F2007/1852
for fastening magnetically or by suction or the like
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