Precious metal hourglass

Precious metal hourglass

  • CN 202,815,443 U
  • Filed: 07/05/2012
  • Issued: 03/20/2013
  • Est. Priority Date: 07/05/2012
  • Status: Active Grant
First Claim
Patent Images

1. noble metal hourglass comprises by two transparent vessels that the glass cavity body forms up and down, it is characterized in that described transparent vessel inside is provided with evengranular noble metal sand grains.

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