1638920

Information

• Patent Grant
• 1638920

• References
• Source

• Patent Number

  1,638,920

• Date Filed

  Not available

• Date Issued

  Tuesday, August 16, 1927
  97 years ago

• CPC

  • C03B35/068 - by gravitational force

• US Classifications

  • 198 - Conveyors: power-driven
  • 209 - Classifying, separating, and assorting solids
  • 414 - Material or article handling