3863885

Information

• Patent Grant
• 3863885

• References
• Source

• Patent Number

  3,863,885

• Date Filed

  Not available

• Date Issued

  Tuesday, February 4, 1975
  49 years ago

• CPC

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

• US Classifications

  • 249 - Static molds