Kiyoshi Alyfuku has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: An indication system of a camera for audibly and distinguishably indicating at least two different kinds of information of the operating state of a self-timer, a warning against the photographing operation for insufficient brightness of the object or low range of a shutter speed, the voltage checking of a battery and the other necessary information for photographing operation. The indication system comprises an acoustic device having a sound which varies in volume, tone or time interval thereof in accordance with various kinds of output signals of a controlling circuit for digitally controlling the acoustic device by means of counting signals of a binary counter.
Abstract: In the disclosed device, the character of sound formed by a sound generator is varied by placing the sound generator in a chamber and varying the chamber to produce at least two sound modes indicating at least two data. According to one embodiment, an aperture in the chamber is covered with a shield accessible from the outside of the camera housing. According to another embodiment, the resonant frequency of the sound is varied by varying the shape of the chamber. In a third embodiment, the chamber is covered and uncovered by varying the registry of two series arranged apertures to the chamber.