Portable holding tank

Environmental heating and cooling; fluid handling and sanitary e – Fluid handling or treatment equipment – Storage tank

Design Patent

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Design Patent

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D0490138

CLAIM:
The ornamental design for a portable holding tank, as shown and described.

REFERENCES:
patent: 4145773 (1979-03-01), Sargent et al.
patent: D251674 (1979-04-01), Sayward
patent: 4776631 (1988-10-01), Sargent et al.
patent: 4805660 (1989-02-01), Antos et al.
patent: 4908885 (1990-03-01), Antos
patent: 4944048 (1990-07-01), Sargent et al.
patent: 5031249 (1991-07-01), Sargent
patent: D356851 (1995-03-01), Holmstadt et al.
patent: D430919 (2000-09-01), Claussen
patent: 6189161 (2001-02-01), Rijn et al.

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