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:
Oct. 13, 1992
Filed:
Sep. 05, 1990
Lee H Altmayer, Hockessin, DE (US);
Christopher M Wurm, Landenberg, PA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A method of creating a self-documenting logfile which records the status and operation of a substantially computer-controlled device. The method comprises the steps of accepting input commands from a user for controlling the device status and operation; monitoring the device characteristics; detecting deviations in the device status, user inputs, and procedural steps in the device's operation; writing these detected events to the logfile with the date and time of which the detected event occurred; and retrieving the logfile upon user demands for review of the logfile. In order to comply with good laboratory practices (GLP), the method additionally comprises steps for verifying the user input commands by determining the acceptability of the input commands, detecting inadvertent alteration to the logfile and testing the validity of the logfile for invalid data. Steps for providing an enciphering key within the event lines which comprise the logfile in order to detect tampering are also disclosed.