Assignee
CHESAPEAKE & OHIO RAILWAY
3 granted patents·21 citations·filing 1975–1978
Top patents by PatentIndex Score
3 records- 0143US4221521AApparatus for loosening frozen coal in hopper carsCHESAPEAKE & OHIO RAILWAY·Filed 1978·Granted Sep 9, 1980·9 cites·4 claims
- 0237US3945684AAB freight valve test rackCHESAPEAKE & OHIO RAILWAY·Filed 1975·Granted Mar 23, 1976·10 cites·4 claims
- 0313US4103817ARailway hopper car door frame assemblyCHESAPEAKE & OHIO RAILWAY·Filed 1975·Granted Aug 1, 1978·2 cites·4 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →