Found a few patches related to this launch on eBay - not sure from which organization (Jim?).[/url]
The second image looks like a metal pin version of the first.
They look like what I call the "launch patch" or "rocket patch", which I believe is USAF (although it could be ULA). Slightly strange because it doesn't keep with what was beginning to look like a standard format for launch patches on NRO launches from VAFB. "Mission" or "Payload" patches (the ones that are usually painted on the rocket or tower) don't typically list all the organisations involved.
The third patch is just the patch of the 4th Space Launch Squadron of the USAF. 4SLS is the unit responsible for EELV launches from Vandenberg. That patch is not specific to this launch.
Due to the size of the rocket and location of the launch site this can only be one of three things - KH-11, Lacrosse or Misty. Given that Lacrosse hasn't flown since 2005 and its replacements are now being launched, that is extremely unlikely. Misty was probably cancelled around 2005/07; there are some who believe one satellite remains to be launched however I am not among them.
It is widely known that two KH-11s were ordered when FIA was cancelled, and it seems very obvious that NROL-49 was the first of those, so logically this launch could be the other, and possibly the last KH-11. I'd assume the satellite will be launched into the Western plane of the constellation to replace USA-186 (NROL-20), which was launched by the last ever Titan rocket to fly, in October 2005. USA-186 will presumably then replace its 16-year-old backup USA-129, which based on previous replacements will probably be deorbited in the next few months.
A few interesting things to note about the L65 patch though... The rocket appears to be flying into the sunset, which implies this is the last launch for something. The payload would be a good guess - it's also worth noting that with the end of KH-11 and the trend towards smaller spacecraft, this could also be the last Delta IV Heavy launch from Vandenberg.
It's also possible that the symbol might mean something completely different - a similar depiction of the Sun appeared on the NROL-49, NROL-41 and NROL-34 launch patches, however none depicted a rocket flying directly towards it as this one does.
There appear to be 8 stars on the patch. I really don't know what these represent; it's the fifth Delta IV launch from Vandenberg, the seventh heavy. It is possible that at the time of the patch's design another Heavy was expected to launch before it, but this seems unlikely. Another possibility is that it could symbolise this being the eighth satellite for the Western plane of the KH-11 system, however stars on patches usually symbolise the system as a whole or not at all.
The other thing is the orbit track shown on the patch; while this is probably decorative, there have been some patches (particularly for SDS and Trumpet satellites) where the track shown has represented the target orbit. This would indicate a launch to the northwest for this mission, while I would expect a KH-11 launch to be to the south...the more westerly track might suggest a radar-imaging payload like Lacrosse, however I feel that it is far more likely that the track shown has no relevance to the actual course that the rocket will follow.
The white symbols to the left and right of the rocket (Δ and IV) are self-explanatory.