2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
Rotary Tooth-Brush
Patent for a crank powered rotary toothbrush. Designed with the purpose of easily cleaning teeth with a simple automatic mechanism, with added projection via a shield around the brush for protecting gums and cheeks from being scraped by the brush.
Date:
October 8, 1918
Creator:
Abel, Charles
System:
The Portal to Texas History
Film-Mask for Cameras
Patent for adjustable (improved) mask plate for different film widths (sizes) for cameras.
Date:
October 8, 1918
Creator:
Burdette, Richard S.
System:
The Portal to Texas History