There was an attempt to add these to unicode in the mid 00s, and it failed for the same reason this will: GINETEX won't grant the trademark license, because the

There was an attempt to add these to unicode in the mid 00s, and it failed for the same reason this will: GINETEX won't grant the trademark license, because then they'd no longer be able to ensure that whoever has the rights to use the symbols is using them correctly.