Mar 7, 1903 : 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.

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.

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