Welcome to the new version of the Patents Manual. Please note there are changes to the numbering and sequence of the chapters and pages in the manual. You are encouraged to take the time to explore and familiarise yourself with this new structure. The role of common general knowledge

Date Published

Construing a specification role of Common General Knowledge 

Examiners need to construe the specification in light of the common general knowledge (CGK) and the state of the art at the priority date of the application.​​​​​​​ (Kimberly-Clark Australia Pty Ltd v Arico Trading International Pty Ltd and others (2001) 207 CLR 1 at page 16).

CGK is knowledge which every worker in the art may expected to have as part of their technical background (Automatic Coil Winder Co Ld v Taylor Electrical Instruments Ld (1944) 61 RPC 41 at page 43).

The CGK is a combination of training, experience, observation, and reading.

Unlike the courts, examiners usually do not have the benefit of direct evidence from a PSA about the CGK. Therefore, examiners need to draw on a range of existing written sources, such as standard handbooks, to establish what the relevant CGK is.

Amended Reasons

Amended Reason Date Amended

Published for testing

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