Search Results for: Electric soil heating apparatus
husbandry patents (class ) miscellaneous (class / . r) modified earth's surface, e.g., sod, turf, reinforced (class / . f) potting or transplanting machine (class / . p) plant support placing machine, e.g., vine tying (class / . s) debarking, dethorning, or girdling (class / . d) water culture, apparatus
or method (class / r) porous support (class / ) substrate or matrix, e.g., gel, artificial soil (class / s) cultivating chamber (class / ) nutrient recirculation system (e.g., hydroponic system) (class / r) individual support (class / ) mushroom culture (class / ) electroculture, magnetoculture or electrocuting...
https://patents.justia.com/patents-by-us-classification/47