Title:
Method of and means for analyzing record cards
United States Patent 2000403
Inventors:
Michael, Maul
Publication Date:
05/07/1935
Export Citation:
Click for automatic bibliography generation
Assignee:
IBM
Primary Class:
235/454
Other Classes:
178/17D, 209/583, 209/655, 235/456, 235/494, 382/182
International Classes:
G06K9/18; G06K9/18
View Patent Images:
Download PDF 2000403        PDF help