1788821

Information

• Patent Grant
• 1788821

• References
• Source

• Patent Number

  1,788,821

• Date Filed

  Not available

• Date Issued

  Tuesday, January 13, 1931
  95 years ago

• CPC

  • B28B3/22 - by screw or worm
  • B28B3/222 - Screw or worm constructions

• US Classifications

  • 425 - Plastic article or earthenware shaping or treating: apparatus