1693693

Information

• Patent Grant
• 1693693

• References
• Source

• Patent Number

  1,693,693

• Date Filed

  Not available

• Date Issued

  Tuesday, December 4, 1928
  96 years ago

• CPC

  • B28B7/0082 - with surfaces for moulding parallel grooves or ribs
  • B28B7/162 - for building blocks or similar block-shaped articles
  • B28B7/183 - for building blocks or similar block-shaped objects
  • Y10S425/058 - Undercut

• US Classifications

  • 249 - Static molds
  • 425 - Plastic article or earthenware shaping or treating: apparatus