1721770

Information

• Patent Grant
• 1721770

• References
• Source

• Patent Number

  1,721,770

• Date Filed

  Not available

• Date Issued

  Tuesday, July 23, 1929
  95 years ago

• CPC

  • E06B3/5454 - inside U-shaped section members
  • E06B1/12 - Metal frames
  • E06B2003/5472 - in an at least partly preassembled frame by introducing it through a slot in one of the frame members or inserting the pane before completing the frame

• US Classifications

  • 052 - Static structures