Updated November 2017
The United States Constitution gives Congress the power "to promote the progress of science and useful arts, by securing for limited times to authors and inventors the exclusive right to their respective writings and discoveries". Congress first exercised this power in 1790 when the first patent act was enacted. During the following years, several new patent laws were passed and a major revision of the patent act was made in 1952. The patent law today attempts to encourage and reward those who create something new.
Put the number of invention or book next to its inventor or author in the PATENT OFFICE.
1."Wizard of Oz"__________________________ 12."Cat in hat"_________________________
2.Cylinder lock___________________________ 14.Lightening rod_______________________
4.Phonograph______________________________ 15.Milk condensation____________________
5.Pistol Revolver_________________________ 16.Polio Vaccine________________________
6.Arc searchlight_________________________ 17.Carpet Sweeper_______________________
7.Magnetic telegraph______________________ 18."Little Women________________________
8."Encyclopedia Brown"____________________ 19.Telephone____________________________
9.Wireless telegraph______________________ 20."Tom Sawyer"_________________________
10.Vulcanized rubber______________________ 21."Amelia Bedelia"_____________________
11."Little House on Prarie"_________________
Bonus: Write the year of each invention