1621502

Information

• Patent Grant
• 1621502

• References
• Source

• Patent Number

  1,621,502

• Date Filed

  Not available

• Date Issued

  Tuesday, March 22, 1927
  97 years ago

• CPC

  • B29D7/01 - Films or sheets
  • Y10T29/304 - Using transitory solid cover material

• US Classifications

  • 029 - Metal working