Patent information:

Patent:Utility 517,591
Patented:April 3, 1894
Applied:January 6, 1894
Title:Insulating Tube
Description:Wall tube with longitudinal fin ribs
Category:Wall Tube
Assigned to: 

Patentee Information:

ROBINSON, Miner Newton, MA

Class and subclass information:

Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:152GINSULATORS Through wall or plate Bushing type Grommets or tubes;

Known specimens:

None known

Drawings:

Drawing page 1

Page 1