Illus. in: American Farmer ..., v. 4. Baltimore, 1823, p. 380. Reference copy may be in LOT 4434 F. This record contains unverified, old data from caption card. Caption card tracings: Farm machinery...; Cotton More
Significance: The Main Gate, erected as a simple yet elegant, classically inspired colonnade, was built in 1883-84 to form the ceremonial entrance into what was then referred to as the Soldiers' Home National More
Significance: The Main Gate, erected as a simple yet elegant, classically inspired colonnade, was built in 1883-84 to form the ceremonial entrance into what was then referred to as the Soldiers' Home National More
Significance: The Main Gate, erected as a simple yet elegant, classically inspired colonnade, was built in 1883-84 to form the ceremonial entrance into what was then referred to as the Soldiers' Home National More
Significance: The Main Gate, erected as a simple yet elegant, classically inspired colonnade, was built in 1883-84 to form the ceremonial entrance into what was then referred to as the Soldiers' Home National More
Significance: The Main Gate, erected as a simple yet elegant, classically inspired colonnade, was built in 1883-84 to form the ceremonial entrance into what was then referred to as the Soldiers' Home National More
Significance: The Main Gate, erected as a simple yet elegant, classically inspired colonnade, was built in 1883-84 to form the ceremonial entrance into what was then referred to as the Soldiers' Home National More
These are the two patent drawings for a physical-fitness exercise device. The inventor was Robert B. McWhirter of Newark, Ohio. The 1925 U.S. patent for this device was applied for in 1923. Its patent number i More
These are eight of the patent drawings for a physical-fitness exercise device. The inventor was Albert C. Wendelken of Marietta, Ohio. The 1926 U.S. patent for this device was applied for in 1925. Its patent n More
Drawings of a rotating coherer invented by Serbian-American engineer Nikola Tesla, from his US patent no. 613,809, application filed July 1, 1898, granted November 8, 1898. Drawings from Sheet 4 of patent ap More
Long-tailed pair with cathode auto-biasing. Figure 3 from A. D. Blumlein's US Patent 2185367 (British 482740), priority from 1936-07-04. The original was slightly altered - I removed output cathode followers, w More
Alexander Graham Bell's Telephone Patent Drawing, 03/07/1876. Bell's telephone was the first apparatus to transmit human speech via machine. His work culminated in one of the most profitable and contested of More
The drawing is from the 1958 U.S. patent for a rocker-roller balance board designed by Frederic George Ludwig of Woodbridge, Connecticut. In the online database of the U.S. Patent and Trademark Office, the vers More
The drawing is from the 1958 U.S. patent for a rocker-roller balance board designed by Frederic George Ludwig of Woodbridge, Connecticut. In the online database of the U.S. Patent and Trademark Office, the vers More