Hacker News Reader

Are there any known forensic marking methods used by monochrome laser printers?

No, but it may still be possible to tell them apart in some ways.

It would be good to start with

and then see who's cited them in the last few years.

I'm hypothesizing, but you could make the slightest of changes to the print.

For example, if it's text, modify the font ever so slightly so it's invisible to the eye but measurable to someone looking for it.