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Vignetting Attachment for Multiple-Exposure Cameras.
Patent for a multiple exposure camera attachment that allows multiple exposures to be made on a single plate or film, blending the exposures perfectly while avoiding harsh lines. The attachment is a telescopic tubular attachment with "a plurality of apertured light ray interrupting diaphragms" (lines 77-78).
Date:
April 5, 1921
Creator:
Moine, Selest E.
System:
The Portal to Texas History
Drainage System.
Patent for a drainage system for draining wet lands and lakes.
Date:
July 5, 1910
Creator:
Osborne, Charles W.
System:
The Portal to Texas History