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Attachment for Rotaries.
Patent for rotary well-drilling machinery where the "ring or bushing to rotate independently of the table and the present invention is directed to means for accomplishing the rotating effect." (line 24-27)
Date:
July 20, 1920
Creator:
Johnston, Horace G.
System:
The Portal to Texas History
Surgical Splint.
Patent for a surgical splint specifically for the substitution of erectile tissue of the corpora cavernous of the genital organ to promote fecundation even in the absence of an erection.
Date:
July 13, 1920
Creator:
Renois, John J.
System:
The Portal to Texas History
Rotary-Drill Head.
Patent for a drill apparatus that improves the head gears and driving mechanisms that makes for an efficient driving of the apparatus and allows for free vertical movement.
Date:
July 27, 1920
Creator:
Johnston, Horace G.
System:
The Portal to Texas History
Planter Attachment.
Patent for a seed planter attachment with an easily adjustable shovel.
Date:
March 2, 1920
Creator:
Sanders, Walter F.
System:
The Portal to Texas History