| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering | |
| #3 | Mechanical elements | |
| #4 | Transport | |
| #5 | Measurement | |
| #6 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Hand carts | |
| #3 | Foundations and excavations | |
| #4 | Locks | |
| #5 | Bolts for doors or windows | |
| #6 | Nails | |
| #7 | Transport or storage devices | |
| #8 | Special measuring | |
| #9 | Springs | |
| #10 | Measuring speed and acceleration |
| # | Name | Total Patents |
|---|---|---|
| #1 | Castle Alfred B | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US4490088A | Lifting tool | |
| US4321003A | Lifting tool | |
| US4227731A | Tool for lifting and maneuvering utility access covers | |
| US4154071A | Auxiliary locking mechanism | |
| US3894416A | Auxiliary locking mechanism | |
| US3183512A | Mechanical graphic recording omnidirectional accelerometer | |
| US3201161A | Latches | |
| US3097820A | Instrument clamps | |
| US2855211A | Dolly | |
| US2957666A | Clamps | |
| US2938700A | Mounting means | |
| US2938690A | Instrument clamping assembly | |
| US2608085A | Locking device |