Title:
Wear indicating device for drill bits
United States Patent 2582312


Inventors:
Del, Homme Daniel L.
Application Number:
US11712849A
Publication Date:
01/15/1952
Filing Date:
09/22/1949
Assignee:
REED ROLLER BIT CO
Primary Class:
Other Classes:
175/317, 175/393
International Classes:
E21B12/02
View Patent Images:
US Patent References:
2489687Drill bit1949-11-29
2461164Wear indicating attachment for drilling bits1949-02-08