If you really need these in Bach, you shouldn’t be playing Bach in the first place…
But for educational purposes frog/middle/tip of the bow indications are quite useful, of course. I personally prefer (and occasionally pencil in) recognisable pictograms not unlike those in Nordin’s second example. Personally, I use M for middle of the bow. I believe ↔︎ for whole bow is pretty common, but the single arrows ← and → could mean anything. I use them for ‘hold back’ (i.e. don’t hurry), or ‘forward’ (i.e. don’t slow down).
The symbols for frog/middle/tip in the OP are way too cryptic. Let me politely say I discourage their use.