2857646

Information

• Patent Grant
• 2857646

• References
• Source

• Patent Number

  2,857,646

• Date Filed

  Not available

• Date Issued

  Tuesday, October 28, 1958
  66 years ago

• CPC

  • B28B7/225 - for making stairs or stair units comprising more than one step

• US Classifications

  • 249 - Static molds