Ball-Bearing. (open access)

Ball-Bearing.

Patent for a new and useful ball bearing, including instructions and illustrations.
Date: October 17, 1899
Creator: Millen, George
System: The Portal to Texas History
Automatic Telephone-Directory. (open access)

Automatic Telephone-Directory.

Patent for a new and useful automatic telephone directory, including instructions and illustrations.
Date: October 17, 1899
Creator: Neuendorff, John B.
System: The Portal to Texas History