Assigning a non-exclusive license means to retain the freedom to assign licenses also to other parties.

The three provide 10-year non-exclusive licenses.

DW grants you a non-exclusive license to use the Program in this package according to the following terms.

Following verification the winner also had to provide a non-exclusive license to Netflix.

Licensees pay a small fee for a nationwide, non-exclusive license.

Permission to use evidence of non-exclusive licenses to set royalties.

A grant of a non-exclusive license does not need to be in writing to be enforceable.

Most are copyright to the author, and arXiv has only a non-exclusive irrevocable license to distribute them.

It is unclear whether this grant is an exclusive assignment or a non-exclusive license, however.

A different thing is if a company gets a non-exclusive, non-transferable license to a given patent.