1521764

Information

• Patent Grant
• 1521764

• References
• Source

• Patent Number

  1,521,764

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1925
  100 years ago

• CPC

  • B66F13/00 - Common constructional features or accessories
  • E21D15/526 - for step-by-step extension of the prop
  • Y10S254/01 - Jack bases
  • Y10T29/53991 - Work gripper, anvil, or element

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force
  • 029 - Metal working
  • 248 - Supports