Mark's Locksmith
| Häfele | Hafele, Haefele | OKB68, OKB96, OKB97, OKB143, L6S, LAS blanks |
| Handcuffs | Smith & Wesson | S&W, 6750 |
| Hard | 1307A, 997E | |
| Harley Davidson | luggage compartment | 1527, 1527R |
| Harp | 997E | |
| Harpa | 1022 | |
| Haskell | 1000F, 1041T | |
| Hatteras | OKB33, OKB131, OKB132, OKB165, OKB166 |
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| Haworth | office furniture | HAW2, HAW3, HAW1, HAW4 |
| Heher | 1069N, O1122a | |
| Hero | padlock | 1098M, 1000V |
| High Point | desk | 999 |
| Hillman | padlock | VR91AR |
| Hilok | 1171 | |
| HMP | desks | 1069N |
| Holga | 1571 | |
| Holiday | Rambler RV | 1098M |
| Hon | file cabinet | 1556, Key News #53, Ilco #60 |
| Hon | 1003M, 997E | |
| Hong Kong | mortise lock | 1022 |
| Hong Kong CKK | 999 | |
| Hong Kong LL | 999 | |
| Hong Kong York Guard | 1022 | |
| Hot Shot | 1022 | |
| Hotpoint | freezer | 1041G |
| Hudson | cam locks | Key News 60 and 56½; Ilco #60 |
| Hudson | garage door | 1098M |
| Hudson | mailboxes | 1003M, R1003M |
| Hurd | padlocks | 1125A, 1125D, O1122A |
| Hurd | tool boxes | 1536, Key News #57; Ilco #60 |
| Hyster | fork lift | 1430 |