Patents by Inventor Robert Schiffmann

Robert Schiffmann 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).

  • Microwave ovens
    Patent number: 6909077
    Abstract: A microwave oven has an oven cavity in which a launch site for delivering microwave energy into the oven cavity is provided by a hole (6) in a wall (2) of the cavity and a match plate (10). In order to improve the distribution of microwave energy in the cavity, the oven also has a second wall (4) partially covered on its internal side by a second match plate (30) which acts as a second resonator. The second wall may include a hole which, with the second match plate, forms a second launch site for delivering microwave energy into the oven cavity, in which case the two holes are interconnected by a waveguide via which said microwave energy is supplied from at least one magnetron.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: June 21, 2005
    Assignee: Microwave Ovens Limited
    Inventors: Kenneth Ian Eke, Robert Schiffmann
  • Microwave ovens
    Publication number: 20040035857
    Abstract: A microwave oven has an oven cavity in which a launch site for delivering microwave energy into the oven cavity is provided by a hole (6) in a wall (2) of the cavity and a match plate (10). In order to improve the distribution of microwave energy in the cavity, the oven also has a second wall (4) partially covered on its internal side by a second match plate (30) which acts as a second resonator. The second wall may include a hole which, with the second match plate, forms a second launch site for delivering microwave energy into the oven cavity, in which case the two holes are interconnected by a waveguide via which said microwave energy is supplied from at least one magnetron.
    Type: Application
    Filed: September 16, 2003
    Publication date: February 26, 2004
    Inventors: Kenneth Ian Eke, Robert Schiffmann