| | CLASS NOTES |
| 1 | DF | MISCELLANEOUS |
| 1.5 | DF | ATTACK-ACTUATED DEFEATING MECHANISMS {1} |
| 2 | DF | HASP {2} |
| 14 | DF | PORTABLE {3} |
| 57 | DF | SPECIAL APPLICATION {7} |
| 262 | DF | SYSTEMS {1} |
| 266 | DF | OPERATING MECHANISM {6} |
| 431 | DF | PARTS, ATTACHMENTS, ACCESSORIES AND ADJUNCTS {9} |
| | ****************************** |
| | DIGESTS |
| | ****************************** |
| DIG 1 | DF | Tumbler registerable with aperture |
| DIG 2 | DF | Tumbler, lateral locking |
| DIG 3 | DF | Schlage |
| DIG 4 | DF | Jacobi |
| DIG 5 | DF | Magazine cylinder and pin tumblers |
| DIG 6 | DF | Bolt dogged in retracted position |
| DIG 7 | DF | Sleeve with embeddable tooth |
| DIG 8 | DF | Closure-operator lock |
| DIG 9 | DF | Pawl and ratchet lock |
| DIG 10 | DF | Thermally controlled |
| DIG 11 | DF | Garage door lock |
| DIG 12 | DF | Extension link with detachable link fastener |
| DIG 13 | DF | Socket-key lock |
| DIG 14 | DF | Insertable permanent key |
| DIG 15 | DF | Plug with tumbler retainer |
| DIG 16 | DF | Jail door lock |
| DIG 17 | DF | Check-key lock |
| DIG 18 | DF | Revolving door lock |
| DIG 19 | DF | Showcase lock |
| DIG 20 | DF | Push to project and lock bolt, key-released |
| DIG 21 | DF | Permutation, rotatable-segemental tumbler bolts |
| DIG 22 | DF | Segmental tumbler |
| DIG 23 | DF | Segmental slot in tumbler cooperating with a pin |
| DIG 24 | DF | Curved slot in tumbler |
| DIG 25 | DF | Peripheral pin on tumbler |
| DIG 26 | DF | Locking lug on bolt |
| DIG 27 | DF | Manually locked, key-released |
| DIG 28 | DF | Fence tumbler |
| DIG 29 | DF | Wedge tumbler |
| DIG 30 | DF | Switch lock |
| DIG 31 | DF | Handle assembly, lock-controlled |
| DIG 32 | DF | Positioners |
| DIG 33 | DF | Starting point |
| DIG 34 | DF | Cover fasteners |
| DIG 35 | DF | Double-ended lock cylinder |
| DIG 36 | DF | Spring-returned lock cylinder |
| DIG 37 | DF | Cylinder lock, multiple tumbler arrangements |
| DIG 38 | DF | Cylinder lock, lateral keyhole |
| DIG 39 | DF | Cylinder and knob connection |
| DIG 40 | DF | Cylinder lock utilizing sheet metal |
| DIG 41 | DF | Coin-controlled |
| DIG 42 | DF | Lost motion devices |
| DIG 43 | DF | Lock protectors |
| DIG 44 | DF | Combination changers |
| DIG 45 | DF | Time lock and auxiliary lock operable on failure of time lock |
| DIG 46 | DF | Conducting key |
| DIG 47 | DF | Laterally movable key |
| DIG 48 | DF | Fluid pressure lock |
| DIG 49 | DF | With alarm |
| DIG 50 | DF | Time lock, fluid-controlled |
| DIG 51 | DF | Light sensitive control means |
| DIG 52 | DF | Over center spring |
| DIG 53 | DF | Adjustable spring |
| DIG 54 | DF | Double-ended spring |
| DIG 55 | DF | Unitary multiple springs |
| DIG 56 | DF | Lock protecting cover |
| DIG 57 | DF | Screw guard |
| DIG 58 | DF | Handle guard |
| DIG 59 | DF | Lock with indicator |
| DIG 60 | DF | Opposed cylinders |
| DIG 61 | DF | Die cast cylinder |
| DIG 62 | DF | Cylinder plug stop |
| DIG 63 | DF | Multiple locks |
| DIG 64 | DF | Door spanning bolt |
| DIG 65 | DF | Double door lock |
| DIG 66 | DF | Double-ended bolt |
| DIG 67 | DF | Handle-contained latch operator |
| DIG 68 | DF | Oblique bolt |
| DIG 69 | DF | Floating bolt |
| DIG 70 | DF | Geneva stop |
| DIG 71 | DF | Combined permutation and key lock |
| DIG 72 | DF | Telephone lock |
| DIG 73 | DF | Thumb latch operator |
| DIG 74 | DF | Spring tumbler |
| DIG 75 | DF | Adjustable tumbler |
| DIG 76 | DF | Manually operated tumbler |
| DIG 77 | DF | "Jaw" tumblers |
| DIG 78 | DF | Sliding and oscillating bolt |
| DIG 79 | DF | Sliding and rotary bolt |
| DIG 80 | DF | Sliding bolt with sliding operating means |
| DIG 81 | DF | Camouflaging means |
