nber category 3 Drugs & Medical subcat 32 Surgery & Med Inst.

uspto classes
128 Surgery
600 Surgery
601 Surgery: Kinesitherapy
602 Surgery: Splint, Brace, or Bandage
604 Surgery
606 Surgery
607 Surgery: Light, Thermal, and Electrical Application

Historic patent counts for subcat 32

uspto search in the 1790 to present database

ccl/128/$ OR ccl/600/$ OR ccl/601/$ OR ccl/602/$ OR ccl/604/$ OR ccl/606/$ OR ccl/607/$

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