Well Al this 1 is hard so ill try 2 keep it simple.
Patents r a PAIN,patents r limited2 certain things& THERE IS A REAL FINE LINE ON ALL THIS SO UVE GOT 2 GIVE A LOT OF LEE-WAY ON WOT I SAY !!! they only really started in the 40s-50s i think-shoes etc r not under this cos people have been wearing shoes,clothes 4 so long that it cant b done.
Trade marks & patents work in the same way.
If u make a product or logo u see the goverment type thingy commitee,where they have records of these things & they see if ur item is the same/relates 2 wot another company have paid 2 keep the rights etc cos theyve done all the work & u havnt (also it can protect the consumer aswell cos in theory its can stop inferoir product that cud b dangerous)ur product cud b a copy that u stole & u havnt done any r&d/work on it(for all they know u cud have stole it or doin sumfing u suddnt do)AS AGAIN ITS A VERY COMPLICATED FINE LINE!!!.
Trade marks were first b4 patents 2 stop other small companys making/using the bigger companys name/reputation etc(vice versa) 2 stop comsumers being conned into buyin products that wasnt made or approved by the bigger company(vice versa).
View loader was the first type of company 2 patent the
light sensor for that type of use(in the hopper neck 2 say when the paintball passes it(wayyyyyyy back in the eary day of when hoppers had 2 do sumfing 2 stop blockages,Sum used air 2 blow the blockage away etc but the veiw loader was the most popular)
But this patent is limited in the US thats why the Autofeed(uk made hopper) uses the same idea but different made products(not off the shelf)etc but its only 4 sale in the uk & not the usa.
Now the Halo is made in the usa so it its under attack,if it was made in the UK the mayb they cud get away with it but it cudnt b sold in the usa directly.
Ihope this goes 2 sum way of xplaining why patents etc r & 2 the complexity of it all.
If not ask me wot u dont understand & i can xplain it in more detail.
Ive had abit 2 drink so pls give me a bit of lee-way!