so is the Filco double shot a possibility?
Don't post off-topic!
To answer your question:
A key with FILCO of Filco or filco is technically possible.
There would be no copyright issues, if we made a Cherry key btw, but Filco
could be an issue.
We can alos write Das on a Keyboard key, or Alps. Unicomp will surely write IBM on a key right away and no one will ever notice or complain, except that they could not print it straight on the key.
You can also write Bull or Sun on a key. Don't know if Honeywell would be a problem, written on a wider key.
DEC should be OK and HP can also mean High Point.
But FILCO?