United States Patent 3006574
Inventors:
Hardy, Elbert C.
Publication Date:
10/31/1961
Assignee:
Hardy, Elbert C.
International Classes:
A01K89/08; B65H75/40; G01B3/10; G01B3/11; A01K89/00; B65H75/38; G01B3/02
Foreign References:
| SE139492A | | | | |
| AU128286B | | | | |
| AU157515B | | | | |