Evacuated solar heat collector
Exothermic composition
Exothermic composition and hot pack
Exothermic composition and hot pack
Exothermic compositions and container for heating food
Exothermic heater device
Exothermic metallic composition
Extruded metal solar collector roofing shingle
Fabrication of trough-shaped solar collectors
Feeding bottle
Field burner
Field burner apparatus
Field burning apparatus
Field cooker
Field sanitizing apparatus
Finned tube solar energy absorber
Fire plow
Flameless heat generator
Flameless heat source
Flameless heater and method of making same