1536828

Information

• Patent Grant
• 1536828

• References
• Source

• Patent Number

  1,536,828

• Date Filed

  Not available

• Date Issued

  Tuesday, May 5, 1925
  100 years ago

• CPC

  • C03B23/0252 - by gravity only
  • C03B23/0026 - by gravity
  • G02C7/02 - Lenses Lens systems; Methods of designing lenses
  • G02C2202/08 - Series of lenses, lens blanks

• US Classifications

  • 351 - Optics: eye examining, vision testing and correcting
  • 065 - Glass manufacturing
  • 359 - Optical: systems and elements