Lever system teaching tool
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Description
The broken lines in the drawings illustrate portions of the lever system teaching tool that form no part of the claim.
The wire frame lines shown throughout the views depict surface contour.
Claims
The ornamental design for a lever system teaching tool, as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
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- Stem Supplies. Link: https://www.stem-supplies.com/engineering/simple-and-complex-machines/learninglever-lever-set. Visited Sep. 5, 2019. LearnLever Lever Set. (Year: 2019).
- Stem Supplies, Gopher Sport, © Apr. 2018, pp. 16, 17, and 20-23.
Patent History
Patent number: D893623
Type: Grant
Filed: Apr 16, 2018
Date of Patent: Aug 18, 2020
Assignee: The Prophet Corporation (Owatonna, MN)
Inventors: Jason Butler Koberstine (Apple Valley, MN), Alison Marie Harguth (Owatonna, MN)
Primary Examiner: Lauren D McVey
Application Number: 29/644,256
Type: Grant
Filed: Apr 16, 2018
Date of Patent: Aug 18, 2020
Assignee: The Prophet Corporation (Owatonna, MN)
Inventors: Jason Butler Koberstine (Apple Valley, MN), Alison Marie Harguth (Owatonna, MN)
Primary Examiner: Lauren D McVey
Application Number: 29/644,256
Classifications