Heat exchangers not being parts of machines, namely, preheaters and gas-gas heaters including rotary regenerative designs thereof for heat recovery from combustion flue gas; heat exchangers not being parts of machines, namely, preheaters producing preheated air in excess of that required for combustion; ancillary equipment for utilizing excess preheated air, namely, air injectors and mixers being air handling devices for introducing preheated air into ductwork carrying flue gas from a combust...

Neurostimulators and neuromodulation apparatus, namely, nerve stimulators; nerve stimulator apparatus; electronic stimulator for nerves and muscles

Neurostimulators and neuromodulation apparatus, namely, nerve stimulators; nerve stimulator apparatus; electronic stimulator for nerves and muscles