You would need an Serial flash programmer. As well as a dump of your current BIOS and a DXE driver module.
Now let me explain why this is a complicated and shitty process.
The supervisor password is stored in a SMSC MEC1633L sort of a TPM chip and not in the main UEFI EEPROM.
Additionally in the T440 the BIOS is married to the internal TPM chip (SMSC) and contains a unique signature of that.
Resetting this is complex because:
It first involves reading the BIOS and creating a full dump. This is critical as otherwise you are stuffed trying to restore any other BIOS to it.
One has to patch the dumped BIOS binaries and inject a small UEFI program (DXE Driver). This program will read the secure eeprom, reset the TPM certificate and password and also rewrite the secure eeprom and reconstruct all data such as writing back serial number, RFID config/UUID/Type/checksums etc.
Flash the patched BIOS dump (this will only function for that TP btw), start the laptop, while the BIOS is loading it will execute the unlock routine in the DXE module and unlock the SVP(supervisor password) and TPM.
Finally, write the original BIOS dump back.
Now this is the part where I tell that unfortunately for whatever damn reason I can’t find my hacked DXE driver code anymore. I want to beat myself with a stick for being so stupid to loose it.
Or maybe I never copied it off the computer at my old workplace. But either way I’m not going to be able to help you any further with that right now.
EDIT: There is apparently still some romanian guy that does this at allservice.ro but I don’t know If his patch can be trusted and he charges quite a bit for the job. But either way this gives me hope that someone else still has similar code to do this.