Crystal Microphone Patent on Blackboard

Musicians, specifically singers, will love these quality, vintage prints of a classic crystal microphone.This patent design is also available in Blueprint, Chalkboard, and Parchment styles. Choose from sizes that run from 5x7 inches all the way to 18x24 inches.

Download Large (11" x 17". PDF Format)
Download Medium (8.5" x 11". PDF Format)
Download Small (5" x 7". PDF Format)

Download Hi-Res Patent Design for $12.99 (18" x 24". JPG format)
Download Hi-Res Patent Design for $9.99 (16" x 20". JPG format)

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This patent design belongs to these categories: electronics

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