Johannes Ostermeier patented the flashbulb for cameras.
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Thomas Edison filed his patent for the Optical Phonograph.
Inventor Robert Fulton tested his 66-foot long boat on River Seine in Paris, France.
Benjamin Franklin announced his invention of bifocal eyeglasses.
German inventor Ferdinand von Zeppelin granted a patent for the navigable balloon.
Noah Cushing patented the washing machine in Quebec, Canada.
