Collection
Serial/Series Title
Digital US Topo Maps: 7.5 Minute Series (Topographic)
50
2000 Census County Subdivision Block Map
36
2010 Census County Block Map
35
2010 Census P.L. 94-171 County Block Map
35
7.5 Minute Series (Topographic)
34
2000 Census County Block Map
28
1990 Census County Block Map
27
Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)
25
2007 Economic Census Map
7
Western United States 1:250,000
7
10 More
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321 Matching Results
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Results:
313 - 321 of
321
Grapple
Patent for providing a cheaper version of removing pipes or tubing from wells.
Date:
March 18, 1913
Creator:
Drake, Charles W.
Object Type:
Patent
System:
The Portal to Texas History
Governor for Spring Motors
Patent for an improved governor specifically for spring motors, but it can also be applied to other motors.
Date:
April 11, 1905
Creator:
Kirby, William Buckingham
Object Type:
Patent
System:
The Portal to Texas History
Gate-Operating Mechanism
Patent for an improved gate operating mechanism to allow vehicles to approach the gate and the gate move to the open position and to move to the closed position has passed through the gate opening. Includes illustrations.
Date:
August 21, 1917
Creator:
McDaniel, James M. & McDaniel, Claud M.
Object Type:
Patent
System:
The Portal to Texas History
Ribbon-Cabinet.
Patent for a ribbon cabinet that is designed to display the different types of ribbon available.
Date:
December 30, 1913
Creator:
Daniel, Robert O.
Object Type:
Patent
System:
The Portal to Texas History
Door Operating Mechanism for Mail Boxes
Patent for door for mail boxes that can be quickly opened or closed by postal workers.
Date:
February 13, 1917
Creator:
Calcote, William S.
Object Type:
Patent
System:
The Portal to Texas History
Pipe-Clamp.
Patent for a pipe grip that is formed out of two bars with two gripping surfaces forming two mechanical jaws.
Date:
September 7, 1915
Creator:
Brown, Milo
Object Type:
Patent
System:
The Portal to Texas History
Railway-Brake.
Patent for "railway brakes, which are constructed to grip the wheels, and which, in the event of an emergency, may be set to lift the wheels off the track in order to obtain a quick stoppage of the train" (lines 9-14) including illustrations and explanations of the brakes' components.
Date:
June 26, 1913
Creator:
Drake, Charles W.
Object Type:
Patent
System:
The Portal to Texas History
Plow-Point Attachment
Patent for an attachment for the point of a plow that protects the point from wear and tear, especially in soil that is sandy.
Date:
July 18, 1916
Creator:
Trout, Calvin L.
Object Type:
Patent
System:
The Portal to Texas History
Cultivator Foot
Patent for a cultivator foot. This cultivator foot is designed to be a new kind of inexpensive, simple, and efficient cultivator foot.
Date:
August 22, 1922
Creator:
Dawson, Joseph E.
Object Type:
Patent
System:
The Portal to Texas History