Patents by Inventor John William Douglas

John William Douglas 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).

  • Publication number: 20090106464
    Abstract: An interface device is configured for printing from a host having a communications port to an imaging apparatus having a PictBridge port for receiving print data from a camera. The host includes an operating system having a spool subsystem. The interface device includes an input port configured to communicatively connect to the communications port; an output port configured to communicatively connect to the PictBridge port; and a controller interconnecting the input port and the output port. The controller is configured to execute program instructions to print from the host via the communications port to the imaging apparatus via the PictBridge port in real time using an output of the spool subsystem.
    Type: Application
    Filed: October 19, 2007
    Publication date: April 23, 2009
    Inventors: Barry Richard Cavill, John William Douglas, Brian Thomas Jones, Randy Allen O'Neal, Harold Van de vere Putman
  • Patent number: 3940126
    Abstract: A reproduction machine has a photoconductive surface and a stripping device for separating the leading edge of a transfer sheet from the surface. Located adjacent to the stripping device is a guide which is maintained at a reference voltage such that an electrostatic attraction is set up between the guide and the transfer sheet so as to draw the latter toward the guide. A support member generally uniformly separated from the guide serves to support the transfer sheet in the event the electrostatic attraction is insufficient to draw the transfer sheet to the guide. Either the guide or the support member may be at least partially covered by a layer of insulating material.
    Type: Grant
    Filed: June 11, 1974
    Date of Patent: February 24, 1976
    Assignee: Xerox Corporation
    Inventor: John William Douglas Cooper