3 Matching Results

Search Results

Results: 1 - 3

Windmill.

Description: Patent for a windmill with vanes that can compensate for varying wind speeds without being damaged by high winds.
Date: October 21, 1919
Creator: Ochoa, Victor Leaton
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Projecting-Machine.

Description: Patent for improvements to a projector that relate to advertising. The inventor references adjustments to a previous patent, No. 1069521 from August 5, 1913. Adjustments include making the device more accurate and reliable, and to adapt it to be able to display opaque surfaces, postcards, and other printed items during any time of day. Additionally, the revoluble slide magazine has a mechanism that allows it to operate continuously without assistance from the operator.
Date: October 7, 1919
Creator: Bernard, Oscar C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
Back to Top of Screen