Samuel Oakman

Patent 434,879

[Trade Journal]

Publication: Electrical World

New York, NY, United States
vol. XVI, no. 10, p. 177, col. 2


OUR ILLUSTRATED RECORD OF ELECTRICAL PATENTS.

 

U. S. Patents Issued August 19, 1890.

434,879. Electric Insulator; Samuel Oakman, of Melrose, Mass. Application filed Sept. 13, 1889. In an insulator, the combination of the petticoat and a series of internal annular projections having inclined tops and flat bases adopted to act as waterstops.

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Keywords:Samuel Oakman
Researcher notes: 
Supplemental information: Patent: 434,879
Researcher:Glenn Drummond
Date completed:November 23, 2010 by: Glenn Drummond;