Her mentor Annie Malone is sometimes said to have patented the hot comb .
Madame C.J. Walker used combs with wider teeth and popularized their use together with her system of chemical scalp preparation and straightening lotions .
Madame C.J. Walker 's mentor Annie Malone is sometimes said to have patented the hot comb .
Madame C.J. Walker used combs with wider teeth and popularized their use together with her system of chemical scalp preparation and straightening lotions .