Middlefield Plastics and Plastic Products Mfrs 16345 Kinsman Rd H.M.S., Inc. provides payphone service to telco?s and independent payphone providers, and has expanded its injection molding operations to accommodate the molded plastics needs. Middlefield OH Plastics and Plastic Products Mfrs HMS Inc www.hmsincohio.com H.M.S. Inc. HMS Telecommunications Cell phone Cellular phone Payphone Pay telephone Paystation Telephone Phone Payphone parts Pay telephone parts Paystation parts Phone parts Payphone accessories 120b 120c Payphone service Paystati H.M.S. Inc. HMS Telecommunications Cell phone Cellular phone Payphone Pay telephone Paystation Telephone Phone Payphone parts Pay telephone parts Paystation parts Phone parts Payphone accessories 120b 120c Payphone service Paystati Business Reviews HMS Inc Testimonials