1808556

Information

• Patent Grant
• 1808556

• References
• Source

• Patent Number

  1,808,556

• Date Filed

  Not available

• Date Issued

  Tuesday, June 2, 1931
  93 years ago

• CPC

  • F16K5/0457 - Packings
  • G01F3/225 - characterised by constructional features of membranes or by means for improving proper functioning of membranes

• US Classifications

  • 092 - Expansible chamber devices
  • 236 - Automatic temperature and humidity regulation