7 Matching Results
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7
Key.
Patent for a key, which can be produced in quantity but without any of them being able to open the same door.
Date:
February 4, 1908
Creator:
Katzenberger, Oscar
System:
The Portal to Texas History
Mute Attachment for Pianos
Patent for an attachment that mutes pianos. Illustrations included.
Date:
February 4, 1908
Creator:
Pfeifer, Edmund Irwin
System:
The Portal to Texas History
Padlock.
Patent for a padlock, which can only be opened with a certain key and prevents the use of many lock-picking devices.
Date:
February 4, 1908
Creator:
Katzenberger, Oscar
System:
The Portal to Texas History
Grain Drying and Cooling Machine.
Patent for a machine for drying and cooling grain before storage.
Date:
February 4, 1908
Creator:
McCarthy, Stephen J.
System:
The Portal to Texas History
Envelop Stamping Machine
Patent for an envelop stamping machine. This machine is designed to process sheets of stamps for the application of one stamp per envelope. Illustrations Included.
Date:
February 4, 1908
Creator:
Human, Oscor M.
System:
The Portal to Texas History
Horse-Releaser.
Patent for a horse releaser, which has multiple sections and a section can be released to free the horse from the vehicle.
Date:
February 4, 1908
Creator:
White, Alton
System:
The Portal to Texas History
Cotton Chopper
Patent for a cotton chopper. Illustrations included.
Date:
February 4, 1908
Creator:
Gauntt, Granville B. & Floeckinger, Frank C.
System:
The Portal to Texas History