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RPX’s CEO released a statement on our response to the COVID-19 emergency. Click here to access.

Controller scheduling constant current charging of a rechargeable power source of an elevator system

  • US 6,431,324 B2
  • Filed: 02/20/2001
  • Issued: 08/13/2002
  • Est. Priority Date: 02/28/2000
  • Status: Expired due to Fees
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