5 Matching Results

Search Results

Advanced search parameters have been applied.

Perforator.

Description: Patent for an improved perforator that attaches to a multigraph and perforates sheets of paper that pass through the multigraph so the sheets can be separated into parts, with illustrations.
Date: May 8, 1917
Creator: Hahl, Harold D. & Lambert, James J.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen