I-beam spirit level

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric

Design Patent

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Design Patent

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29258945

CLAIM:
The ornamental design for an I-beam spirit level, as shown and described.

REFERENCES:
patent: 2453091 (1948-11-01), Holloway et al.
patent: D459251 (2002-06-01), Scheyer
patent: 6418634 (2002-07-01), Szumer
patent: D468221 (2003-01-01), Greaves et al.
patent: D498152 (2004-11-01), Hickey
patent: 2005/0039341 (2005-02-01), Hickey

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