Patents Represented by Attorney Charles L. Botsford

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  • Fan with wide curved blades
    Patent number: 4000955
    Abstract: A fan with a plurality of wide curved blades that eliminate air space and overlapping between blades has improved efficiency in that each of the blades is of a curvature that deflects most, if not all, of the air hitting the blades toward, and then forward along, the longitudinal axis of the fan.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: January 4, 1977
    Inventor: Kiyoshi Tokutomi