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Priority to JP1984185319UpriorityCriticalpatent/JPS6199194U/ja
Publication of JPS6199194UpublicationCriticalpatent/JPS6199194U/ja
G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
G09F19/00—Advertising or display means not otherwise provided for
G09F19/12—Advertising or display means not otherwise provided for using special optical effects
G09F19/14—Advertising or display means not otherwise provided for using special optical effects displaying different signs depending upon the view-point of the observer
Landscapes
Business, Economics & Management
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Accounting & Taxation
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Marketing
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Physics & Mathematics
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General Physics & Mathematics
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Engineering & Computer Science
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Theoretical Computer Science
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Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices
(AREA)
