EHC (Escalator Handrail Company – founded by Ronald H. Ball) has been granted Patent #6450228 for escalator handrail advertising.
Application Date: February 22, 2000 and granted on September 17, 2002
EHC (Escalator Handrail Company – founded by Ronald H. Ball) has been granted Patent #6450228 for escalator handrail advertising.
Application Date: February 22, 2000 and granted on September 17, 2002