Hallo cellular phone users

did you also forget to switch the keylock system on or do you also hate
always to switch it off before doing a phone ?
I do and also had many times the phone dialing without my intention :-)

Some weeks ago I had an innovative idea I just patented:
Lock/Unlock automatically the cellular phone keypad whenever it's not
in a defined inclination (the one when in the hand, e.g. between 30°
and 70°)

How useful do think is such a feature ?
How much would you appreciate such a feature in your new mobile phones
?

Here some additional infos:
-It's automatic: No user action to lock or unlock required anymore - No
"key lock" systems anymore to unlock each time before calling someone.
-It's immediate: The cellular phone is always ready for use as soon as
it's in the hands of the user - No need to press always the annoying
unlocking key sequence - No need to wait the device gets automatically
locked after X seconds before putting it in the pocket
-It's secure: Unintentionally key presses when the device is in the
pocket or bag will have no effect. Device is usable only when in the
hands of the user !