Patents by Inventor Keisuke Iwai

Keisuke Iwai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220196253
    Abstract: A hot water supply device including an inlet pipe, an outlet pipe, a burner unit, a heat exchanger, an exhaust aperture, a first temperature sensor detecting a measured exhaust temperature of the exhaust gas, a second temperature sensor detecting a water temperature of water entering the inlet pipe, and a processor. The processor is configured to obtain an error between the measured exhaust temperature and an estimated exhaust temperature, and detects that scale clogging has occurred inside the heat exchange tubing based on an index which is generated using the error between the measured exhaust temperature and the estimated exhaust temperature. The estimated exhaust temperature is a first predetermined value that is determined using a numerical equation which has at least the water temperature of water entering the inlet pipe and a scale number of the hot water supply device as variables of the numerical equation.
    Type: Application
    Filed: December 17, 2020
    Publication date: June 23, 2022
    Inventors: Keisuke IWAI, Kazuhiro NISHIMURA, Masahiro IGUCHI
  • Publication number: 20020021766
    Abstract: A television receiving apparatus and its remote controller are provided with storage medium slots, respectively. When a user enters program reservation data on a remote controller, this program reservation data is stored in an external memory via the storage medium slot. The user attaches this external memory to the storage medium slot of the television receiving apparatus. The television receiving apparatus reads the program reservation data from the external memory and specifies a broadcast program corresponding to the program reservation data from already received and stored EPG information. The television receiving apparatus registers reservation setting based on an information element representing this broadcast program.
    Type: Application
    Filed: March 15, 2001
    Publication date: February 21, 2002
    Inventor: Keisuke Iwai