Patent information:

Patent:Utility 600,475
Patented:March 8, 1898
Applied:October 23, 1897
Title:Electrical Insulator and Method of Making Same
Description:Multiple thin porcelain shells fused together with glaze, ""glaze-filling"" method, U-928 & U-928A. (see patent 601,195) (see patent gb1898-0006235) Patent was owned by the R. Thomas & Sons Co.
Category:Insulator
Assigned to: 

Patentee Information:

BOCH, John W. East Liverpool, OH

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:174INSULATORS With conductor holding means Insulator structure;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:210INSULATORS Sectional, multi-part, composite, or coated Pin socket type;
Class:264PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES
Subclass:DIG54Processes in making insulators;

Known specimens:

Number:U 928
Number:U 928A

Drawings:

Drawing page 1

Page 1