×

Face mask or like

  • US 1,820,602 A
  • Filed: 04/18/1929
  • Issued: 08/25/1931
  • Est. Priority Date: 04/18/1929
  • Status: Expired due to Term
0
Associated Cases
0
Associated Defendants
0
Product Citations
0
Petitions
15
Forward Citations
0
Assignments
First Claim
Patent Images

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×