• All sections
• H - Electricity
• H01M - Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy
• H01M 8/04228 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during shut-down

Patent holdings for IPC class H01M 8/04228

Total number of patents in this class: 328

10-year publication summary

Principal owners for this class