Patents by Inventor Donald M. Rosenthal

Donald M. Rosenthal 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: 6123476
    Abstract: A writing implement which employs a incremental advancement mechanism and a detachable sharpener. The sharpener, in turn, carries a detachable shavings container. This writing implement finds particular application in conjunction with crayons. The various components of the present invention, and the manner in which they interrelate, will be described more fully hereinafter.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: September 26, 2000
    Inventor: Donald M. Rosenthal
  • Patent number: 5957602
    Abstract: Disclosed is a wax pencil holding device formed from a main body. The main body is formed from first and second tubular portions. A thin wax pencil is adapted to be removably received within the first tubular portion of the main body. The wax pencil is dispensed and retracted via a sliding plunger. The wax pencil further includes a pencil sharpener with a frusto-conical inset portion. The pencil sharpener is removably coupled to the first end of the second tubular portion. Further included is a shaving container for storing the shavings of the wax pencil. The shaving contain is adapted to be removably coupled to the second end of the pencil sharpener.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: September 28, 1999
    Inventor: Donald M.. Rosenthal
  • Patent number: 5722782
    Abstract: A wax pencil holding device including an intermediate hollow cylinder with an inner surface being threaded. Further provided is a top cap having an aperture centrally formed therein. An interior writing utensil holder tube is coaxially situated within the intermediate cylinder such that a top end of the tube communicates with the aperture of the top cap. The tube has at least one slit longitudinally formed therein, whereby a writing utensil may be situated within the tube and extended from the aperture of the top cap. Also included is a chuck situated within the tube. The chuck is adapted to slide vertically therein. As such, the writing utensil abuts the chuck when situated within the holder tube. Finally, an actuator disk is situated within the intermediate cylinder having a top face, a bottom face, and a threaded outer periphery for threadedly engaging the threaded inner surface of the intermediate cylinder.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: March 3, 1998
    Inventor: Donald M. Rosenthal
  • Patent number: 5551787
    Abstract: A device for supporting a wax pencil for writing. The inventive device includes a main body for receiving a wax pencil therewithin. A knob is rotatably mounted to an end of the main body and supports a threaded rod projecting thereinto. A plunger is engaged to the threaded rod and can be advanced therefrom to bias a desired portion of the wax pencil from the main body for use in a writing procedure.
    Type: Grant
    Filed: August 7, 1995
    Date of Patent: September 3, 1996
    Inventor: Donald M. Rosenthal