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US Patent: 5,251,521
TORX-compatible elliptical driver
Patentees:
Michael D. Blackston (exact or similar names) - Plymouth, MN
Dennis A. Burda (exact or similar names) - Buffalo, MN

USPTO Classifications:
81/436, 81/460

Tool Categories:
wrenches : wrench set holders

Assignees:
Bondhus Corp. - Monticello, MN

Manufacturer:
Bondhus Corp. - Monticello, MN

Witnesses:
Unknown
Patent Dates:
Applied: Jan. 31, 1992
Granted: Oct. 12, 1993

Patent Pictures:
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