| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3350-3350 | Safety device is a subclass of device |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 30838-30838 | Climbing carabiner is a subclass of safety device |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3375-3375 | Vehicle safety device is a subclass of safety device |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3419-3419 | Safety harness is a subclass of safety device |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3444-3444 | Hearing protection is a subclass of safety device |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3478-3478 | Protective eyewear is a subclass of safety device |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3526-3526 | Respirator is a subclass of safety device |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 3555-3555 | Safety vest is a subclass of safety device |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4359-4359 | Helmet is a subclass of safety device |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4742-4742 | Motorcycle glove is a subclass of safety device |
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