Patents by Inventor Sayu Chen

Sayu Chen 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).

  • Patent number: 5493353
    Abstract: Dual video and still-film camera embodying video recorder camera technology in two popular types of still-film camera: single-lens reflex (SLR) (1) and compact (2). The most advanced digital image-sensing semiconductor chip (charge- coupled device or CCD) (4) (21) and circuit board (8) (23), as well as other functional video camera components, are combined with the conventional apparatus of the still-film camera to support the video and still-film modes of photography in a single camera casing. By means of a manual switch (9) (24) or, as an alternate embodiment, an electrical switch, the user can extend the digital image sensor (4) (21) into the light-image line of sight in order to activate video operation or can retract the image sensor in order to allow still-film operation unimpeded by the video apparatus.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: February 20, 1996
    Inventor: Sayu Chen