Related
Patent drawing - MPPprojr - . Public domain image
Summary
Dwg. from US Pat No 707,934, film projector involved in Motion Pic. Pat. case. PD because US pat.
Date
2016
Source
USPTO
Copyright info
public domain
Summary
Dwg. from US Pat No 707,934, film projector involved in Motion Pic. Pat. case. PD because US pat.
Date
Source
Copyright info
