1858803

Information

• Patent Grant
• 1858803

• References
• Source

• Patent Number

  1,858,803

• Date Filed

  Not available

• Date Issued

  Tuesday, May 17, 1932
  92 years ago

• CPC

  • E04G15/068 - for channels open towards the surface
  • E04G15/061 - Non-reusable forms

• US Classifications

  • 052 - Static structures