Patent information:

Patent:Utility 430,296
Patented:June 17, 1890
Applied:November 1, 1889
Title:Insulator
Description:CD 257, CD 259, CD 263, dove-tail ears on crown - helmet. Patent is also found on New Lexington porcelain insulators M-3890 and M-4325A.
Category:Insulator
Assigned to: 

Patentee Information:

OAKMAN, Samuel Melrose, MA

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:174INSULATORS With conductor holding means Insulator structure;

Known specimens:

Number:CD 257
Number:CD 259
Number:CD 263
Number:M 3890
Number:M 4325A

Drawings:

Drawing page 1

Page 1