Patent ID: 11933677
Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  C | IPC C  G

Claim 12:
13. A product control system according to claim 11,
wherein
the control equipment includes a memory unit which stores a color density-time information, which indicates a relation between the color density of the temperature detecting material applied to the product and a time period that the product is arranged in the environment,
and wherein
the control terminal acquires the color density-time information from the control equipment based on the acquired product identifying information, calculates the time period that the product is arranged in the environment based on the acquired color density of the color tone information and the color density-time information, displays a calculated time period on the display unit, and also transmit the product identifying information and the calculated time period, together with their relation, to the control equipment.