IO Shen
Says it began 2004
I.O.Shen Mastergrade knives have overcome this problem by using a layer of extremely hard Japanese steel (Rockwell 62 degrees), which is sandwiched between two layers of softer stainless steel (Rockwell 10 degrees), to produce the ultimate cutting edge. The softer layers add a protective shock absorbing element to the blade, whilst the HRC62 steel which runs through the middle is exposed at the edge of the blade to ensure that your knife is the sharpest blade that can possibly be manufactured. [...] The handles also have a very distinctive Tai Tang pattern in the handle, making them a stylish knife choice. [...] Launched in 2004, I.O.Shen Mastergrade knives are now established as a firm favourite with chefs and budding amateurs alike. [...] We have High Street stockists all over the Great Britain and on-line partners.
Quoted from ioshen.co.uk, in IO Shen's own words. We have not edited it and we do not vouch for it.