1861673

Information

• Patent Grant
• 1861673

• References
• Source

• Patent Number

  1,861,673

• Date Filed

  Not available

• Date Issued

  Tuesday, June 7, 1932
  92 years ago

• CPC

  • B29D99/0071 - Masks
  • B29L2031/4835 - Masks
  • Y10S264/52 - Processes of making corrugated tubes for gas mask

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes