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. 19, 2002
Filed:
Dec. 16, 1998
Robert F. Bretl, Portland, OR (US);
Martin R. McClure, Portland, OR (US);
Gemstone Systems, Inc., Beaverton, OR (US);
Abstract
A queue data structure is stored on a computer-readable medium to represent a queue or list. The data structure includes a head pointer that points to the last or most recent list element to have been removed from the queue, and a tail pointer that points to the most recently added list element in the queue. The head pointer and tail pointer may be implemented as separate objects. The queue data structure is applicable to computer arts such as transactional database management. The queue data structure can prevent concurrency conflicts that could otherwise occur when an object modified in one transaction (e.g. by one user) is modified by another concurrent transaction (e.g. by another user).