The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2009
Filed:
Apr. 29, 2004
Kuniaki Matsuda, Sapporo, JP;
Kenyou Nagao, Sapporo, JP;
Nobuyuki Saito, Sapporo, JP;
Shun Oshita, Sapporo, JP;
Kuniaki Matsuda, Sapporo, JP;
Kenyou Nagao, Sapporo, JP;
Nobuyuki Saito, Sapporo, JP;
Shun Oshita, Sapporo, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A data transfer control device having: a hub dedicated data storage section which stores a packet transferred between the data transfer control device and a hub; a packet transmission section which cyclically issues a token packet to the hub for asking whether the state of the hub has changed or not; a packet reception section which receives a response packet sent from the hub in response to the token packet; and a transfer controller which writes the response packet received by the packet reception section into the hub dedicated data storage section, and generates an interrupt which indicates that the state of the hub has changed.