Counties
2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
Arc-Lamp Attachment
Patent for improving arc lamp attachments. The attachment allows an arc lamp to be able to use an incandescent lamp in place of the electrodes in an arc lamp. The attachment increases the efficiency and durability of the arc lamp.
Date:
April 2, 1918
Creator:
Pratt, James R.
System:
The Portal to Texas History
Grain-Car Door.
Patent for Grain-Car Door. "The object the present invention is to arrange the door for use in transporting grain without requiring any additional grain door or planking on the inside door opening." (Line 3)
Date:
April 23, 1918
Creator:
Hartough, Edward W.
System:
The Portal to Texas History