Association romande
de propriété intellectuelle

titre: The latest in electric baseball scoreboards. George Coleman, inventor of Wash., is shown with the mechanism of the new scoreboard
photo: Harris & Ewing, 1924
source: Library of Congress Prints and Photographs Division Washington DC, USA

titre: A Veteran Inventor. About 6 miles from Washington, on the edge of the little hamlet of Hyattsville, Md., may be found Dr. James Harris Rogers, wizard inventor, now 80 years old, retired from his work but still erect and energetic It was Dr. Rogers, who during the war proved that water as well as earth and air is a medium for the transmission of electro-magnetic waves. Through the « well » located on his property, high officials heard German official reports
photo: Harris & Ewing, 1929
source: Library of Congress Prints and Photographs Division Washington DC, USA

titre: The new ‘flying tube’ airship. Washington, D.C., Mar. 14. Immediate commercial development of a new lighter-than-air airship of novel design, which its engineering sponsors believe will revolutionize air transportation, bringing safety, speed, load capacity, and easy maneuverability to airship performance, was announced today. Air sucked through the tube will create a vacuum in front and give a propulsive kick at the outlet. Universal joints will be located at the entrance and exit of the tube, moving in any direction of the air intake and outlet, thus steering the flying tube. The ship will be entirely metal clad and the lifting power will be helium gas in aluminum partitions. Garret W. Peck, designer and vice pres. in charge of construction, left; and Clifford C. Jones, specialist with the Inter-Ocean Dirigible Corp., right, with the working model of the ship
photo: Harris & Ewing, 1938
source: Library of Congress Prints and Photographs Division Washington DC, USA

titre: How a bill become a law. Now a law, the former bill, reprinted in legal form, is incorporated in the statutes-at-large and filed in the State Department. E.D. Kuppinger, Assistant Chief of the Law Section of the Division of Research and Republication of the State Department is showing placing a law in its final resting place
photo: Harris & Ewing, 1937 or 1938
source: Library of Congress Prints and Photographs Division Washington DC, USA

titre: Bureau of Standards speeds up photomicrography with new apparatus. Washington, D.C., Aug. 18. By means of this new apparatus just designed by the metallurgical divisions of the National Bureau of Standards, it is now possible to make 700 micrographs per working day of the structural effect of corrosion on cross sections of metallic specimans. This new machine uses roll film of 900 negatives at one loading, thus dispensing with the repeated loading and unloading of individual film holders by which method the Bureau was only formerly able to make 12 micrographs per working day. Willard H. Mutohler, one of the designers of the apparatus is hown photographing the corrosion on airplace materials, 8/18/37
photo: Harris & Ewing, 1937
source: Library of Congress Prints and Photographs Division Washington DC, USA

titre: Lettering sign on drugstore window, Picayune, Mississippi
photo: Russell Lee, 1938
source: Library of Congress Prints and Photographs Division Washington DC, USA