Blackboard-Cleaner.
Description:
Patent for a blackboard cleaner that incorporates a "water reservoir having manually controlled means for communicating the water of the reservoir to the rubbing element of the cleaner" (lines 13-17) including an illustration. The rubbing element was also made to be easily removed for replacement or cleaning.
Date:
January 29, 1918
Creator:
Satrum, Gilbert G. & Snartemo, Ingvald B.
Item Type:
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Partner:
UNT Libraries Government Documents Department