IPC code unknown for G02G

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IPC code unknown for G02G

Inggrid
Hi all,


I try to identify technology fields of patents in developing countries. Overall, I was able to do it, except for IPC G02G. It was said that "IPC code unknown for G02G". Does this mean that G02G is a typo?

Thanks in advance for your help.
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Re: IPC code unknown for G02G

patentscope-wipo
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Subclass G02G  never existed in the IPC.  Class G02 contains three subclasses, i.e. G02B, G02C and G02F.
An “inventory of IPC ever used symbols” till version IPC-2018 (valid and deleted symbols) is available from the Download and IT Support Area of the WIPO IPC website.