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File:Johnson Controls Temperature Control System.jpg

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Summary

Description
English: 1895 Patent Drawing of multi-zone temperature control system by Warren Johnson; designated a landmark by ASME
Date
Source US Patent Drawing by Warren Johnson 1895
Author Warren Johnson

Licensing

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Johnson_Controls_Temperature_Control_System.jpg

Captions

1895 Patent Drawing of multi-zone temperature control system by Warren Johnson

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Date/TimeThumbnailDimensionsUserComment
current16:40, 20 October 2019Thumbnail for version as of 16:40, 20 October 20194,595 × 6,921 (10 MB)TomahFUser created page with UploadWizard

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