Patent assignee · DE · COMPANY

ZF FRIEDRICHSHAFEN AG

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3,434Patents
2,730Active
3,434Granted
62Portfolio score

Filing activity: Mar 27, 1991 → Nov 12, 2024 · 829 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US7278949B2 Planetary transmission Mechanical Engineering; Lighting; Heating 1,355 Expired
US6984187B2 Multi-stage gearbox Mechanical Engineering; Lighting; Heating 237 Expired
US7018319B2 Multistep gear Mechanical Engineering; Lighting; Heating 235 Expired
US6991578B2 Multistep gear Mechanical Engineering; Lighting; Heating 217 Expired
US6960149B2 Multistep reduction gear Mechanical Engineering; Lighting; Heating 181 Expired
US6634980B1 Multi-step gear Mechanical Engineering; Lighting; Heating 173 Expired
US7549942B2 Multi-speed transmission Mechanical Engineering; Lighting; Heating 156 Active
US6217478A Position and/or angle control method and device without absolute positions sensor Physics 148 Expired
US8303455B2 Multi-ratio transmission Mechanical Engineering; Lighting; Heating 144 Active
US8398522B2 Multi-stage gearbox Mechanical Engineering; Lighting; Heating 140 Active
US8210981B2 Multi-stage gearbox Mechanical Engineering; Lighting; Heating 125 Active
US7566283B2 Multi-speed transmission Mechanical Engineering; Lighting; Heating 111 Active
US6572507B1 Automatic transmission for motor vehicles Mechanical Engineering; Lighting; Heating 107 Expired
US7469910B2 Spring carrier with adustable spring collar Performing Operations; Transporting 107 Active
US6619615B1 Propotional control pressure valve Mechanical Engineering; Lighting; Heating 106 Expired
US7575533B2 Multi-speed transmission Mechanical Engineering; Lighting; Heating 105 Active
US8465390B2 10-gear automatic transmission Mechanical Engineering; Lighting; Heating 103 Active
US8210982B2 Multi-step-transmission Mechanical Engineering; Lighting; Heating 101 Active
US7556582B2 Multi-speed transmission Mechanical Engineering; Lighting; Heating 100 Active
US8231495B2 Multi step transmission Mechanical Engineering; Lighting; Heating 99 Active
US8251859B2 Multi step transmission Mechanical Engineering; Lighting; Heating 99 Active
US8858387B2 Multi-stage transmission Mechanical Engineering; Lighting; Heating 93 Active
US8403803B2 Multi-ratio transmission Mechanical Engineering; Lighting; Heating 93 Active
US8246504B2 Multi step transmission Mechanical Engineering; Lighting; Heating 93 Active
US7632206B2 Multi-speed transmission Mechanical Engineering; Lighting; Heating 91 Active

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.