2020031

Information

• Patent Grant
• 2020031

• References
• Source

• Patent Number

  2,020,031

• Date Filed

  Not available

• Date Issued

  Tuesday, November 5, 1935
  89 years ago

• CPC

  • C03B9/20 - in "vacuum blowing" or in "vacuum-and-blow" machines

• US Classifications

  • 065 - Glass manufacturing