Patents by Inventor Katsuya Shibutani

Katsuya Shibutani 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).

  • Validating E-mails using message posting services
    Patent number: 9887950
    Abstract: Validation of e-mails is provided. An e-mail is received. A sender of the e-mail is determined. A message posting service account that is associated with the sender is identified. The message posting service is queried for a first hash value that corresponds to the e-mail based, at least in part, on the account. A response is received from the message posting service. Whether the account includes the first hash value is determined based, at least in part, on the response. The e-mail is or is not validated based, at least in part, on the response from the message posting service.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: February 6, 2018
    Assignee: International Business Machines Corporation
    Inventors: Yohkichi Sasatani, Katsuya Shibutani, Ichiro Takiguchi, Yoshiki Yatsu
  • Validating E-mails using message posting services
    Patent number: 9882858
    Abstract: Validation of e-mails is provided. An e-mail is received. A sender of the e-mail is determined. A message posting service account that is associated with the sender is identified. The message posting service is queried for a first hash value that corresponds to the e-mail based, at least in part, on the account. A response is received from the message posting service. Whether the account includes the first hash value is determined based, at least in part, on the response. The e-mail is or is not validated based, at least in part, on the response from the message posting service.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: January 30, 2018
    Assignee: International Business Machines Corporation
    Inventors: Yohkichi Sasatani, Katsuya Shibutani, Ichiro Takiguchi, Yoshiki Yatsu
  • VALIDATING E-MAILS USING MESSAGE POSTING SERVICES
    Publication number: 20160359892
    Abstract: Validation of e-mails is provided. An e-mail is received. A sender of the e-mail is determined. A message posting service account that is associated with the sender is identified. The message posting service is queried for a first hash value that corresponds to the e-mail based, at least in part, on the account. A response is received from the message posting service. Whether the account includes the first hash value is determined based, at least in part, on the response. The e-mail is or is not validated based, at least in part, on the response from the message posting service.
    Type: Application
    Filed: June 28, 2016
    Publication date: December 8, 2016
    Inventors: Yohkichi Sasatani, Katsuya Shibutani, Ichiro Takiguchi, Yoshiki Yatsu
  • VALIDATING E-MAILS USING MESSAGE POSTING SERVICES
    Publication number: 20160359789
    Abstract: Validation of e-mails is provided. An e-mail is received. A sender of the e-mail is determined. A message posting service account that is associated with the sender is identified. The message posting service is queried for a first hash value that corresponds to the e-mail based, at least in part, on the account. A response is received from the message posting service. Whether the account includes the first hash value is determined based, at least in part, on the response. The e-mail is or is not validated based, at least in part, on the response from the message posting service.
    Type: Application
    Filed: June 2, 2015
    Publication date: December 8, 2016
    Inventors: Yohkichi Sasatani, Katsuya Shibutani, Ichiro Takiguchi, Yoshiki Yatsu