[Oil-burner patents for individual- and complex heating systems].
D000388:Air; D005860:Germany, West; D006361:Heating; D006798:Housing; D007564:Japan; D009821:Oils; D010330:Patents as Topic; D010578:Petroleum
D009821:Oils; D010578:Petroleum
Uber Olbrenner-Patente für Einzel- und Sammelheizungen.