If there were a patent US1111111, which read:
US1111111: A "thing" for doing something.
The invention claimed is:
- A "thing".
- A "thing" of claim 1, which uses a "thing 2".
Say my invention was also a "thing" that instead uses a "thing 3", would my "thing" infringe on patent US1111111? I am still unsure as to how strict patent claims are.