EHC (Escalator Handrail Company – founded by Ronald H. Ball) has been granted Patent #2377641 for escalator handrail advertising.
Application Date: February 18, 2000 and granted on April 29, 2003
EHC (Escalator Handrail Company – founded by Ronald H. Ball) has been granted Patent #2377641 for escalator handrail advertising.
Application Date: February 18, 2000 and granted on April 29, 2003