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Priority to NL5399ApriorityCriticalpatent/NL1708C/en
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G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B11/00—Teaching hand-writing, shorthand, drawing, or painting
G09B11/04—Guide sheets or plates; Tracing charts
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Engineering & Computer Science
(AREA)
Business, Economics & Management
(AREA)
Physics & Mathematics
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Educational Administration
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Educational Technology
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General Physics & Mathematics
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Theoretical Computer Science
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NL5399A1914-12-041914-12-04
Improvement to a writing implement for use in writing on unlined paper
NL1708C
(en)
Adjustable calendar in the form of a desk item, e.g. a pencil holder, where the dates and days are set by turning one part of the calendar relative to the other part