Improvement and invention
By: by Herbert Wachsmann ...
Published: 1932
Place of publication: East Orange, N.J.]
Language: eng
Subjects: Patent practice; Inventions
Notes: Cover-title.

"Reprint from Editorial page 'New York times' April 28, 1932."

Microfilm. New York, N.Y., Columbia University Libraries, 1997. 1 microfilm reel, 35 mm.

s 1997 nyu n a

Filmed; NEH Project (FMEST); 1997.