4. Heating
  5. Work chamber having heating means
  6. Having particulate or liquid heat transfer medium in work...

Bob R. Drain

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Apparatus for curing masonry units

Heating – Work chamber having heating means – Having particulate or liquid heat transfer medium in work...
Patent

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Method and apparatus for curing masonry units

Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work
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