Search Results for: Electric soil heating apparatus
(class / ) optical fiber, waveguide, or preform (class / ) light polarizing article or holographic article (class / ) utilizing plasma, electric, electromagnetic, particulate, or wave energy (class / ) continuous or indefinite length (class / ) composite or multiple layer (class / ) rotational molding
(class / ) induction heating (class / ) electrical heating (e.g., resistance heat, etc.) (class / ) direct application of electrical or wave energy to work (e.g., electromagnetic wave, particulate, magnetic, induction heat, sonic, electrostatic energy, etc.)...
https://patents.justia.com/patents-by-us-classification/264