H. W. Johns Mfg. Company issued pamphlet on Keystone hair insulator

[Trade Journal]

Publication: Western Electrician

Chicago, IL, United States
vol. 32, no. 10, p. 199, col. 2


PUBLICATIONS.

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The H. W. Johns-Manville Company of Milwaukee, Chicago and other cities has issued a pamphlet descriptive of the Keystone hair insulator, which is said to be an ideal structural insulator, sound deadener and cold preserver.

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Keywords:H. W. Johns Manufacturing Company
Researcher notes: 
Supplemental information: 
Researcher:Bob Stahr
Date completed:March 17, 2009 by: Bob Stahr;