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Primary view of Phonograph-Needle.
Fletcher, Theodore
September 27, 1921
Primary view of Glass.
Mitrovich, Adolph
October 11, 1921
Primary view of Fireproof Building Construction
Ward, Alfred P.
September 20, 1921
Primary view of Cotton Picking Apparatus.
Alvin, Alleyne D.
November 8, 1921
Primary view of Flush-Valve
Winckler, Henry J.
September 13, 1921
Primary view of Pneumatic Tire.
Williams, Harry S.
May 31, 1921
Primary view of Method of Casting the Hulls of Ships From Concrete and Floating Said Hulls Into a Launching-Bay.
Holmgreen, Julius H.
June 28, 1921
Primary view of Mold for Casting the Hulls of Concrete Ships.
Holmgreen, Julius H.
June 28, 1921
Primary view of Bending-Machine and Method of Bending.
Holmgreen, Julius H.
March 29, 1921
Primary view of Combined Stool and Table
Lewis, Charles E.
February 22, 1921
Primary view of Pressure-Screw.
Menger, Edward W.
August 16, 1921
Primary view of Gradometer.
Hall, Sidney Wilson
May 17, 1921
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