Mark Gregory Posted April 28, 2015 Share Posted April 28, 2015 (edited) Has anybody ever tried to go the US patent office online and search out a 1930's patent drawing ? I want to know how a Pines Winter Front thermostat is assembled . I have many pieces but unsure how they go together . Edited May 21, 2019 by Mark Gregory (see edit history) Link to comment Share on other sites More sharing options...
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