Patents by Inventor Michael J. Bartholomew

Michael J. Bartholomew 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).

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    Patent number: D421116
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: February 22, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Robert J. Mattila, Gary A. Baribeau, Joseph G. Reischel, Michael J. Bartholomew, Kenneth W. Jensen
  • Inlet port adaptor on a full-face respirator lens
    Patent number: D421118
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: February 22, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Joseph G. Reischel, Frank J. Fabin, Michael J. Bartholomew, David P. Knivsland
  • Two position pressure demand inlet port adaptor
    Patent number: D421301
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: February 29, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Joseph G. Reischel, Michael J. Bartholomew, David P. Knivsland
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    Patent number: D433751
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: November 14, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Joseph G. Reischel, Kenneth W. Jensen, Robert J. Mattila, Gary A. Baribeau, Michael J. Bartholomew
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    Patent number: D434847
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: December 5, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Gary A. Baribeau, Kenneth W. Jensen, Robert J. Mattila, Michael J. Bartholomew, Joseph G. Reischel