Collection
Serial/Series Title
2000 Census County Subdivision Block Map
64
7.5 Minute Series (Topographic)
64
1990 Census County Block Map
50
2000 Census County Block Map
49
2010 Census County Block Map
49
2010 Census P.L. 94-171 County Block Map
49
Digital US Topo Maps: 7.5 Minute Series (Topographic)
20
Western United States 1:250,000
11
Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)
10
15 Minute Series (Topographic)
9
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482 Matching Results
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Results:
481 - 482 of
482
Automatic Damper
Patent for "an attachment for stove-dampers whereby said dampers will be automatically moved, in order that the fire may be maintained at a predetermined heat" (lines 9-13).
Date:
January 31, 1888
Creator:
Beauchamp, William A. J.
Object Type:
Patent
System:
The Portal to Texas History
Automatic Circuit Maker and Breaker
Patent for an improved automatic circuit maker and breaker. This breaker specifically is meant to be used in conjunction with lighting systems.
Date:
April 11, 1916
Creator:
Mulford, Benjamin R.
Object Type:
Patent
System:
The Portal to Texas History