Title:
Excavator apparatus having stepper type advancing means
United States Patent 2946578
US Patent References:
/0556718.html
- - 0556718
Tunneling machine
- - 1403530
Tunneling machine
- - 1462997
Horizontal earth-boring machine
- - 1511957
Mining process and system by remote control
- - 2699328
/0556718.html
- - 0556718
Tunneling machine
- - 1403530
Tunneling machine
- - 1462997
Horizontal earth-boring machine
- - 1511957
Mining process and system by remote control
- - 2699328
Inventors:
Smaele, Albert DE.
Publication Date:
07/26/1960
View Patent Images:
Export Citation:
Assignee:
Smaele, Albert DE.
Primary Class:
Other Classes:
299/60, 299/58, 299/12, 175/392, 175/62, 175/99, 175/104, 175/94, 175/76, 175/319
International Classes:
E21B4/18; E21D9/10; E21B4/00