Watering indicator

Details Watering indicator Watering indicator

2004-05-06

2008-08-19

Williams, Hezron E. (Department: 2856)

Measuring and testing

Moisture content or absorption characteristic of material

By desiccation or extraction

Reexamination Certificate

active

07412878

ABSTRACT:
An Indicator that visually signals when it is time to start and stop watering by the Indicator's ability to distinctively change it's relative physical size and/or shape as it takes on and releases the water.

REFERENCES:
patent: 4540427 (1985-09-01), Helbling
patent: 5300606 (1994-04-01), Aizawa et al.
patent: 5927003 (1999-07-01), Miller et al.
patent: 2002/0095864 (2002-07-01), Obert et al.

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