Usage of て-form in 知っての通り?

Question

I have just come across the phrase `知っての通り〜` (as you know...)

I have never noticed this usage of て-form before and can't find an explanation.

What is the difference (if any) between this and `知っている通り`?

I have also seen `見ての通り` used in a similar way.

If possible please provide a more generalised explanation of the grammar at work here, and examples of other ways it may be used.

David R. · Accepted Answer

From the handful (two) samples I can find, this form seems to be connected with formal speech, most likely as part of a public address.

-Te can take on all conjunctive particles, the most common are MITE and SHITTE in this form, but there may be others.

The link below (in Japanese) has a more nuanced explanation.

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