Making angles and curves of various forms by interchanging forming-blocks, over which the work is bent, often by hand. ... subclass 33, Curving or straightening, Combined reciprocating bender and pivoted side-shaper. 13. ANGULARanbsp;...
|Title||:||Manual of Classification of Subjects of Invention of the United States Patent Office|
|Author||:||United States. Patent Office|