Category:Patent models

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<nowiki>Patent model; 実動模型; Type of functional model used to illustrate features of a patent</nowiki>
Patent model 
Type of functional model used to illustrate features of a patent
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A patent models was a scratch-built miniature model no larger than 12" by 12" by 12" (approximately 30 cm by 30 cm by 30 cm) that showed how an invention works. It was one of the most interesting early features of the United States patent system

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Media in category "Patent models"

The following 51 files are in this category, out of 51 total.