Title:
GRADER BLADE
United States Patent 3431980
Inventors:
Singer V Jr., Marshall
Publication Date:
03/11/1969
Export Citation:
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Assignee:
Marshall V Jr., Singer
Primary Class:
172/40
International Classes:
A01B11/00; A01B11/00; (IPC1-7): A01B35/04; A01B35/10
View Patent Images:
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US Patent References:
3357498Soil ripper
3286534Piston type vibrator
Foreign References:
IT580703B
CH334926A




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