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Blade-Holder
Patent for a new and useful improvements to a blade holder. It can hold any form of razor blades can be securely held and easily released. The holder allows blades to be inserted safely and then hold blades firmly into place.
Date:
September 27, 1921
Creator:
Lightfoot, Roy L.
System:
The Portal to Texas History
Highway for Grade-Crossings.
Patent for highway-railroad grade crossing designed to slow the flow of traffic as it crosses an intersecting railway.
Date:
September 27, 1921
Creator:
Carter, Kenneth Wilson
System:
The Portal to Texas History
Phonograph-Needle.
Patent for a phonograph needle "which is simple in construction, inexpensive to manufacture, and may be used in connection with phonograph records of different types" (lines 18-21). The needle has a flexible shank (in multiple forms) for improved audio quality, and it accommodates various tip styles for use with many brands of phonograph records.
Date:
September 27, 1921
Creator:
Fletcher, Theodore
System:
The Portal to Texas History
Paper-Cutting Machine.
Patent for an improved paper cutting machine that can achieve more precise cuts for labels, paper boxes, and cartons, and also has a clamping mechanism to hold the paper in place.
Date:
July 27, 1920
Creator:
Downie, James H.
System:
The Portal to Texas History