• All sections
• H - Electricity
• H01M - Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy
• H01M 4/57 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of lead of "grey lead", i.e. powders containing lead and lead oxide

Patent holdings for IPC class H01M 4/57

Total number of patents in this class: 48

10-year publication summary

Principal owners for this class