Patents by Inventor Roger H. Partridge

Roger H. Partridge 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).

  • Optical wavelength modulated long-path gas monitoring apparatus
    Patent number: 5339155
    Abstract: Optical long-path gas monitoring apparatus (2) comprising means (4) for providing a radiation beam, a modulator (10) for modulating the wavelength of the radiation beam such as to produce amplitude modulation of the beam in the presence of the gas being monitored, a radiation detector (12) for conversion of the radiation beam into an electrical signal, and a signal processor (PSD 1,PSD 2) for demodulating the electrical signal to provide a signal dependent upon the gas.
    Type: Grant
    Filed: March 31, 1993
    Date of Patent: August 16, 1994
    Assignee: Secretary of State for Trade Industry
    Inventors: Roger H. Partridge, Robert H. Bradsell, Peter T. Woods