[mackraken]

Most of my employment contracts have typically contained a clause, where my employer gets to claim ownership of anything I’ve built or conceived while on their payroll that can be logically associated with the business.

If I was in this position I’d stop talking to my employer about this until having consulted with an attorney specializing in this field. Definitely do not sign anything between now and then.

[ultrarunner]

I did sign a contract upon my promotion well after the new system was in consistent use, but not before. I was hired as an assistant due to the high workload of the previous process (to the extent you could call it a process). The company likely could not have expanded under the previous arrangement.

[MauroIksem]

My employer is the same way. I'm surprised OP is in this position.