US patent application 2710555, Constant Martin, "Electronic Musical Instrument", published 1955-06-14 , filed 1949-12-28 Fig.1 is a wiring diagram of a circuit of a musical instrument constructed in accordanc More
The first page of patent drawings from the U.S. patent for the board game Mouse Trap, filed 1962-08-24 and granted 1967-01-17. Figure l is a plan view of the game with the game pieces at the starting point, an More
The second page of patent drawings from the U.S. patent for the board game Mouse Trap, filed 1962-08-24 and granted 1967-01-17. Figure 3 is an enlarged perspective view of the first sub-assembly of the mouse t More
The third page of patent drawings from the U.S. patent for the board game Mouse Trap, filed 1962-08-24 and granted 1967-01-17. Figure 5 is an enlarged perspective view of the sub-assembly of the action apparat More
This is one of the patent drawings for the first design of a wobble board known to have been patented. The inventor was Bernard L. Coplin of Carlsbad, New Mexico. The 1957 U.S. patent for this device was appl More
These are two of the patent drawings for the first design of a wobble board known to have been patented. The inventor was Bernard L. Coplin of Carlsbad, New Mexico. The 1957 U.S. patent for this device was ap More