Pipette Or Burette Patents (Class D24/222)
  • Dropper tip or similar article
    Patent number: D317203
    Type: Grant
    Filed: September 23, 1987
    Date of Patent: May 28, 1991
    Inventor: William Walsh
  • Pipette guide
    Patent number: D324736
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: March 17, 1992
    Assignee: Miles Inc.
    Inventors: Kenneth D. Collister, George V. Siddons