Patents by Inventor Vincent M. Yee

Vincent M. Yee 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: 6160355
    Abstract: A lamp control circuit for use in a flashlight having a power supply and a light bulb. The lamp control circuit includes oscillator means selectively applying power to the light bulb for turning the bulb on and off at one of a plurality of a selectable frequencies, voltage indicator means coupled to the power supply for indicating to a user when the voltage level of the power supply falls below a pre-determined level and dimmer means coupled between the light bulb and the power supply for reducing the amount of electrical current supplied to the light bulb. The control circuit is mounted on a circuit board which is configured to indicate to the circuit the number and voltage of the batteries which are used to power the flashlight. An alternative embodiment may also include a light emitting diode for use when the battery voltage is insufficient to meet the threshold voltage of the bulb.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: December 12, 2000
    Inventor: Vincent M. Yee
  • Patent number: 5412548
    Abstract: A multi-function lighting device in the nature of a miniature flashlight and which can serve as a miniature lantern or lamp, as well as a miniature flashlight, and as a miniature signaling device. The lighting device includes a housing with a head for directing light axially outwardly in the nature of a collimated beam, so that the device can function as a flashlight. Connected to the head end is a transparent or translucent sleeve which is slidable with respect to the light source. Thus, when the head and the sleeve are shifted axially outwardly, the light source is located within the transparent or translucent sleeve. When the light source is energized, light will emanate primarily through the translucent or transparent sleeve and the amount of light emanating from the head end is substantially reduced. The device is also effective to operate as a signaling device in which the light is energized and de-energized in a sequencing or so-called "blinking" operation.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: May 2, 1995
    Inventor: Vincent M. Yee