Manual calculating device
Description
The broken lines are directed to environment and form no part of the claimed design.
The stippled shading is meant to indicate a contrast in appearance between the remainder of the manual calculating device.
Claims
The ornamental design for a manual calculating device, as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
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- YouTube. Link: https://www.youtube.com/watch?v=3gjDfc2AF3w. Aug. 1, 2008. Napier's Bones. (Year: 2008).
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Patent History
Patent number: D921109
Type: Grant
Filed: Mar 24, 2020
Date of Patent: Jun 1, 2021
Inventor: Dale Ylitalo (Cokato, MN)
Primary Examiner: Lauren D McVey
Application Number: 29/729,100
Type: Grant
Filed: Mar 24, 2020
Date of Patent: Jun 1, 2021
Inventor: Dale Ylitalo (Cokato, MN)
Primary Examiner: Lauren D McVey
Application Number: 29/729,100
Classifications