Gates Patents Gates Lok-Pin Reuseable fitting. We believe The 3000 A was produced in 1976 or 1977. We could use some help on this. OmniCrimp. We feel The Crimper may have been released earlier. The Gates engineering even references the 1918 patent application. The Gates patent image above does not reflect the final working part. The “C” clamp final version had a greater similarity to the 1918 invention. (see your Gates Catalog for “C” Clamp final image Gates promotes The Mega Crimp as revolutionary. However, the concept was created in 1918 by Edgar Greve. (see patent below # 1,300,956 A)