United States Patent 2984462
Inventors:
O'connor, Donald J.
Publication Date:
05/16/1961
Assignee:
O'connor, Donald J.
Other Classes:
416/231A, 416/198A, 416/200R
International Classes:
A47J43/07; B01F15/00; A47J43/04
Foreign References:
| AU129381B | | | | |
| AT200120B | | | | |
| DE468172C | | | | |