Original sentence: Others have argued that the memory device under development by HP Labs and other forms of RRAM are not actually memristors or memristive systems but part of a broader class of variable resistance systems
Edited sentence: Others have argued that the memory device under development by HP Labs and other forms of RRAM are not actually memristors or memristive systems but part of a broader class of variable resistance systems  and that a broader definition of memristor is a scientifically unjustifiable land grab to favor the memristor patents of Hewlett-Packard