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:
May. 31, 1994
Filed:
Jun. 02, 1992
Kazuko Watanabe, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A data processing system of client/server architecture operating on a message basis comprises client spaces capable of issuing processing requests in the form of messages, and server spaces for executing the processing as requested by checking a request code contained in the message. The request codes are previously classified into client-space dedicated codes and kernel-space dedicated codes. A message communication facility for performing message transfer between the clients and the servers includes a check function for checking whether the message originates in the kernel space when the request code contained in the message is the kernel-space dedicated code. The processing request message issued from a space other than the kernel space by using the kernel space dedicated code is rejected as an error. Security of the system can thus be assured.