Patents by Inventor John De Filippis

John De Filippis 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).

  • Electronic flash attachment for cameras
    Patent number: 4079395
    Abstract: An electronic flash unit for cameras containing a piezoelectric generator as a voltage source provides electronic flash capability to such cameras which normally employ explosive flash bulbs. The flash unit contains delay circuitry for matching the peak light intensity of the flash to the camera shutter exposure time and also includes limiting resistors for protecting the operator from the hazard of high voltage shock. One embodiment of the flash unit provides secure attachment between the camera and the unit by means of a hinged attaching plate and latching arrangement.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: March 14, 1978
    Assignee: International Telephone and Telegraph Corporation
    Inventors: John De Filippis, George F. Hardy
  • Flash attachment for self-developing collapsible cameras
    Patent number: 3943532
    Abstract: An improved flash lamp attachment for self-developing collapsible cameras provides high pressure xenon flash illumination by means of removable and separate flash lamp and power-pack assemblies. The powerpack circuitry utilizes part of the voltage provided within the camera film battery pack along with voltage supplied by an auxiliary battery disposably contained within the power-pack assembly.
    Type: Grant
    Filed: June 25, 1974
    Date of Patent: March 9, 1976
    Assignee: International Telephone and Telegraph Corporation
    Inventor: John De Filippis
  • Camera power-pack unit
    Patent number: D244022
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: April 12, 1977
    Assignee: International Telephone and Telegraph Corporation
    Inventor: John De Filippis
  • Combination telephone instrument
    Patent number: D256917
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: September 16, 1980
    Assignee: International Telephone and Telegraph Corporation
    Inventors: John De Filippis, Clifford W. Shackelton
  • Security telephone
    Patent number: D259043
    Type: Grant
    Filed: June 14, 1978
    Date of Patent: April 28, 1981
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Martin Feinberg, John De filippis, Ting W. Wong