Title:
Raising boom
Document Type and Number:
United States Patent 2542176
Inventors:
Bender, Emil A.
Plaque It!
Sponsored by: Flash of Genius |
Publication Date:
02/20/1951
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Referenced by:
Export Citation:
Assignee:
Bender, Emil A.
Primary Class:
International Classes:
E04H12/34; E21B15/00; E04H12/00
Foreign References:
| DE315266C |