I own a red laser pointer with this type of switch.
Scallywag, some old medical lights had a pocketclip switch as well. The key difference with my design is that you don’t have to hold down or even touch the pocket clip in order for it to activate the light. The original clicky switch remains intact and controls the light but the pocket clip controls the clicky switch.
Tell your friends!
If you’d like to make your own clip switched flashlight you can see my how to thread here ClipSwitch - How to thread
A really cool idea. Doubles as mechanical lockout. 
I don’t normally use lights with clips but I would definitely want to try this one.
OK - I really like the idea of this.
Loved the video with the various lights and the types of switches to activate them. I thought of one other to add. How many times have we pulled a BIC lighter our of our pocket and with a thumb slide turned it on to see in the dark!
All the best in this endeavor.
Images in post #1 and #14 are not visible to me ???
Using Imgur instead of Google now. Are they showing up?
Interesting note: The pictures were showing up on my end every time I reloaded the page or tried a different browser/computer. After about an hour they still showed up for me (must have been in the cache) but they stopped loading on different browsers and computers.
If you want a light that’s not going to switch on in your pocket, buy one with a decent switch - not one that pokes out 10mm above it (like my no longer used aaa tool which always turned on).
My Thorfire PF04 has a low profile switch that is actually hard to switch on, and I’d say almost impossible to accidentally activate.
It doesn’t switch on when you unclip it, granted but I’d have no use for that anyway.
Clever idea though, and good luck with your venture! 
Pictures okay now.
Thanks G0OSE. I’ve not had accidental activation issues with any of my Streamlights but many find their switches too stiff. The Eagtac D series lights have some nice recessed switches that are easy to press and don’t come on inadvertently either.
That said, there are other advantages to a clip switch. Many people, myself included, forget to turn their lights off. Many a time I have pulled my standard switch light out of my pocket either to find it on or the battery dying/dead.
With a clip switch, as long as it’s clipped the light not only can’t come on, it can’t be on.
Also if your light accidentally slips out of your pocket, you’re much more likely to notice a light that’s on versus a light that’s off. Long as your pocket clip is intact, a clip switched light will be shining brightly to alert you that it’s not where it should be.
Updated 2/1/2020: As stated before, the person with the best comment or video will win the blue ClipSwitch Microstream USB (winner will be picked February 15’th, 2020 8:00 p.m. PST). A random commenter will win the black one on leap day and it is a bit special all its own. During testing, it was noticeably brighter to my eye than the three other Streamlight Microstream USBs I had in my possession at the time. So I set it on my lumen tube and it is indeed 20% brighter on both the low and high settings!
My multiplier is 0.23 so as you can see it puts out around 300 lumens on high (compared to the 250 ANSI rating) and it’s 60 lumens on low instead of 50. All the other Microstreams are putting out within a margin of error of their advertised rating on my lumen tube.
It’s a cool idea, especially with some of the more powerful hot rods we now have available.
Have you thought about getting them into the hands of some of the more well known reviewers here and/or on youtube? That is one of the better ways to get eyes on your product out in the community.
Yeah, good idea. Who would you recommend I could send some to? I was thinking of trying Matt from AdventureSport.
Teaser trailer for the ClipSwitch. It’s the flashlight that would have chosen Harry Potter.
Who else would be interested in one? Don’t be shy, even if you don’t have a clever comment you can help make clip switches mainstream by showing your interest.
I’m now giving the black one away to a random commenter on leap day! If you can’t think of something to say, just reply “interested”.
I’m interested in getting my hands on this bright idea. Count me in.
interested
As I understand correctly the clip controls the switch.
So if you are a busy person (MD) you don’t have to switch the light off.
Just tuck it in your breast pocket and the light is off. Take it out and the light is on.
That is what I would call a quick draw light.
I like the concept, and those streamlights look handsome.
Btw, the pics in the OP are huge and the page takes a lot of time to load. Mind that if you show pictures as a percentage of the screen, that is just a display thing, the full picture is still loaded in the page.