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Thermograte, Inc. Patents
Thermograte, Inc.
Roseville, MN
No. of patents:

Patent Number Title Of Patent Date Issued
D263945 Bicycle rack April 20, 1982
4129113 Combination glass door and heat-exchanging grate for fireplaces December 12, 1978
An improved combination glass door closure and ducted (e.g., tubular) heat exchanging grate for fireplaces. The combination grate includes a ducted heat exchanger suitable for positioning within a fireplace cavity. The heat exchanger comprises a plurality of hollow, generally parallel,

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