I don't know what brand they are as they've been on my doors longer than I've owned my house, but my exterior knobs can be locked so you can't enter the house from the outside without a key, but they can still be opened from the inside, even when they are locked. It took us 6 months before we stopped locking ourselves out of the house after we moved in
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Sorry, not much help in your search, but they do exist (at least they did 25 years ago).