Patents by Inventor Jagjit Grewal

Jagjit Grewal 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).

  • Intercom/wireless door bell for multi-handset telephone system
    Patent number: 7738917
    Abstract: A multi handset telephone system with a wireless telecom/doorbell module. The telecom/doorbell module has similar electronics as a cordless handset that includes audio and RF link with a base unit. A speakerphone functionality of a wireless telecom/doorbell audio processor is used to provide an intercom audio conversation. The wireless intercom/doorbell module is battery powered that is either charged by an AC adapter or by an existing doorbell wiring. The wireless intercom/doorbell module also work in parallel with the existing bell wiring. When a page key is pressed, the module pages the telephone system and shorts the doorbell wiring to make an existing bell ring. The doorbell module is coupled with a camera.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: June 15, 2010
    Assignee: VTech Telecommunications Limited
    Inventors: Gordon Ryley, Ralph Tischler, Allan Chi-Yun Wong, Jagjit Grewal, Stephen G. Kropp
  • Intercom/wireless door bell for multi-handset telephone system
    Publication number: 20070042804
    Abstract: A multi handset telephone system with a wireless telecom/doorbell module. The telecom/doorbell module has similar electronics as a cordless handset that includes audio and RF link with a base unit. A speakerphone functionality of a wireless telecom/doorbell audio processor is used to provide an intercom audio conversation. The wireless intercom/doorbell module is battery powered that is either charged by an AC adapter or by an existing doorbell wiring. The wireless intercom/doorbell module also work in parallel with the existing bell wiring. When a page key is pressed, the module pages the telephone system and shorts the doorbell wiring to make an existing bell ring. The doorbell module is coupled with a camera.
    Type: Application
    Filed: May 9, 2006
    Publication date: February 22, 2007
    Inventors: Gordon Ryley, Ralph Tischler, Allan Wong, Jagjit Grewal, Stephen Kropp