EHC (Escalator Handrail Company – owned by Ronald H. Ball) has been granted Patent #3645893 for escalator handrail advertising.
Application Date: February 18, 2000 and granted on February 10, 2005
EHC (Escalator Handrail Company – owned by Ronald H. Ball) has been granted Patent #3645893 for escalator handrail advertising.
Application Date: February 18, 2000 and granted on February 10, 2005