Bone conduction headphones but they are still alive and coming back into production. (and I would recommend them)
E cigarettes nearly died because the person who first patented them could not monetise them (I believe), then the patent ran out and people started manufacturing them.
There are lots of devices on advertising TV like the slap-chop and the steam mops that seem novel and useful but don’t seem to be mainstream.
Bone conduction headphones but they are still alive and coming back into production. (and I would recommend them)
E cigarettes nearly died because the person who first patented them could not monetise them (I believe), then the patent ran out and people started manufacturing them.
There are lots of devices on advertising TV like the slap-chop and the steam mops that seem novel and useful but don’t seem to be mainstream.