Test tube holding device
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Description
The broken lines show portions of the test tube holding device that form no part of the claimed design.
Claims
We claim the ornamental design for a test tube holding device, as shown and described.
Referenced Cited
U.S. Patent Documents
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Patent History
Patent number: D840053
Type: Grant
Filed: Jan 25, 2017
Date of Patent: Feb 5, 2019
Assignee: HEATHROW SCIENTIFIC LLC (Vernon Hills, IL)
Inventors: Gary Dean Kamees (Gurnee, IL), Brian Schneider (Crystal Lake, IL)
Primary Examiner: Anhdao Doan
Assistant Examiner: Mary Shannon Malley
Application Number: 29/591,979
Type: Grant
Filed: Jan 25, 2017
Date of Patent: Feb 5, 2019
Assignee: HEATHROW SCIENTIFIC LLC (Vernon Hills, IL)
Inventors: Gary Dean Kamees (Gurnee, IL), Brian Schneider (Crystal Lake, IL)
Primary Examiner: Anhdao Doan
Assistant Examiner: Mary Shannon Malley
Application Number: 29/591,979
Classifications
Current U.S. Class:
Circular Aperture Or Recess (D24/230)