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The ornamental design for a digital speed drum gauge, as shown and described.
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Patent | Priority | Assignee | Title |
ER8047, |
Patent | Priority | Assignee | Title |
4407073, | Jul 08 1981 | Aktiebolaget Samefa | Measuring apparatus for checking a spring strut appertaining to the front wheel suspension of a vehicle |
D339376, | Oct 20 1989 | Masaharu Abe | Adjustable drafting tool for making perspective drawings |
D412675, | Aug 24 1998 | Flexbar Machine Corporation | Digital drum/rotor micrometer |
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