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

Elevator apparatus with rechargeable power supply and discharge control

  • US 6,457,565 B2
  • Filed: 01/31/2001
  • Issued: 10/01/2002
  • Est. Priority Date: 02/28/2000
  • Status: Expired due to Fees
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