933221

Information

• Patent Grant
• 933221

• References
• Source

• Patent Number

  933,221

• Date Filed

  Not available

• Date Issued

  Tuesday, September 7, 1909
  115 years ago

• CPC

  • G03B21/60 - characterised by the nature of the surface
  • Y10T428/2835 - including moisture or waterproof component
  • Y10T442/3943 - Plural paper or wood pulp layers

• US Classifications

  • 442 - Fabric
  • 052 - Static structures
  • 428 - Stock material or miscellaneous articles