Apparatus for tunnelling
United States Patent 2804754
US Patent References:
/0739969.html
- - 0739969

/1336789.html
- - 1336789

Machine for building sewers
- - 1351137


Inventors:
Kenneth, Bridge Eric
Publication Date:
09/03/1957
View Patent Images:
Download PDF 2804754 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Kenneth, Bridge Eric
Primary Class:
405/141
Other Classes:
299/11
International Classes:
E21D9/08
Foreign References:
GB187601424A
CH278219A