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4 Matching Results
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Trowel.
Patent for "new and useful improvements in Trowels." (lines 8-9) including instructions and illustrations.
Date:
March 2, 1920
Creator:
Parker, Barton J.
System:
The Portal to Texas History
Gate Operating and Locking Means.
Patent for an "invention that relates to new and useful improvements in gates and particularly that class which swing in a vertical plane." (Lines 12-14)
Date:
March 2, 1915
Creator:
Hoffman, F.
System:
The Portal to Texas History
Roller Boring-Drill
Patent for a roller boring drill in which "the cutting rollers are arranged on the drill in a novel manner." Object of invention is to keep the drill centered in the hole to prevent wobbling.
Date:
March 2, 1915
Creator:
Hughes, Howard R.
System:
The Portal to Texas History
Roller Boring-Drill
Patent for roller boring drill that provides the cutting device to maintain clearance of the drill-head and can be adjusted to compensate for wear.
Date:
March 2, 1915
Creator:
Hughes, Howard R.
System:
The Portal to Texas History