Platform Scale-Thaddeus Fairbanks was an American inventor. He was an inventor of heating and cook stoves, cast iron plows, and other items. His greatest invention was the platform scale, which allowed the weighing of large objects accurately (it was invented in 1830).

Railroad T-Rail – Col. John Stevens, III was a American lawyer, engineer, and inventor who constructed the first steam locomotive, first steam powered ferry, and first U.S. comercial ferry, service from estate Hoboken. He was an influential in the creation of the U.S. patent law. Stevens was was born June 26, 1749, in New York City, New York, the son of John Stevens, a prominent state politician who served as a delegate to the Continental Congress, and Elizabeth Alexander, daughter of New York lawyer and statesman James Alexander.

Multi-Coil Magnet- Joseph Henry born in December 17, 1797, who was an American scientist who served as first secretary of the smithsonian Institution. He was secretary for the national Institute for the promotion of science, precusor of smithsonian Institution. He was highly regarded during his lifetime. while building electromagnets, Henry discovered the electromagnet phenomenon of self-inductance and he also discovered inductance independently of Michael Friday.

Mechanical Reaper-The McCormick Reaper was designed by Robert McCormick in Walnut Grove, Virginia. However, Robert became frustrated when he was unable to perfect his new invention. His son Cyrus asked for permission to try and complete his father’s project. With permission granted, The McCormick Reaper was finally patented by his son Cyrus McCormick in 1837 as a horse drawn farm implement to cut small grain crops to be able to feed the smaller crops to people.