I have created a piece of software that converts a proprietary format from the database blob of a large, well known commercial software company into the equivalent open source data type. The large commercial software company states the following on their copyright and trademarks page "This work is protected under United States copyright law and other international copyright treaties and conventions." and links to the DMCA.
I was able to create the software because most details of the format were published in a post on their support forums and the rest I reverse-engineered.
I now wish to open-source my software so others can use it. My question has two parts:
- Can I open-source this at all without getting sued?
- Can I refer to the trademarked product the file format came from in my software and documentation? (I'm assuming I can't use it in the name of my software)
I'm in the UK. The large software company is in the US.