Dunlop got into Golf as an extension of their rubber product business. Likewise Tennis, through tennis balls.
Dunlop made a couple of disastrous decisions and the dodgy period of UK industrial decline certainly didn't help its cause. It was bought by an investment group, who split the company up. Virtually their first action reaped an overall profit (though tht didn't include the debt they took on). They continued to sell bits, with the Dunlop name, to various other groups - both by activity and by country. That's why the Dunlop name is now scattered all across the world!
Maxfli was, at one time, owned by TaylorMade (RBS having taken over the Dunlop-Slazenger after a 'failed' MBO), but they sold the Maxfli name (only) to a US Sports company (Dicks, the guys that sacked 500 Pros a year or 2 ago). TMag (Adidas) still own the tech/patents and the Noodle brand.
For sporting goods, Sumitomo (as in the SRI of Srixon) owns the Dunlop brand in much of Asia, shares ownership with Sports Direct International in US, but Sports Direct own the name elsewhere. Dunlop Tyres have a different, but similar, shared setup!
As further item of interest for Aussie/Kiwi 'followers' of Dunlop/Slazenger, the company that originally bought that area's brands (Pacific Sports) delisted last month from the Aussie Stock Exchange, because they were absorbed into the US Haneswear (as in clothing, notably Hanes underwear) company!
FWIW.
Sports Direct provide Slazenger balls to Wimbledon (over 50000/year)! So some sort of 'prestige' presence continues.
In NZ, I always hungered for an 'English Slazenger' tennis racquet. The quality of wood - and the finish - was much better than the NZ ones. Australian made ones were rather desirable too, the thinner neck gave more touch and feel, though that clashed with my style! 
Aussie Dunlop shoes (equivalent to the Blue Flash, but with Green and Yellow instead of Blue) wee far more comfortable than the virtually un-cushioned tennis shoes available in NZ at the time (mid to late 60s)!
Dunlop did eventually make a(nother) great racquet! John McEnroe used it rather successfully in his pomp, as did Steffi Graf in hers! It was such a good bat at the time that (reputedly) Navratilova negotiated use of one with her sponsors, Yonex (it had their logo) to combat any thoughts that Graf was using 'superior' equipment!
