Patent information:

Patent:Design 108,489
Patented:February 15, 1938
Applied:November 29, 1937
Title:Design for an Electric Insulator
Description:Standard Porcelain No. 57
Category:Knob
Assigned to:Porcelain Products, Inc.

Patentee Information:

DALTON, Rolland E. Fostoria, OH

Class and subclass information:

Class:D13EQUIPMENT FOR PRODUCTION, DISTRIBUTION, OR TRANSFORMATION OF ENERGY
Subclass:131 
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:158FINSULATORS With insulator-supporting or attaching means Fence post insulators;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:175INSULATORS With conductor holding means Insulator structure Self-retaining;

Known specimens:

Number:Specimen known

Drawings:

Drawing page 1

Page 1