Robert D. Freeman
29Patents
11h-index
36Co-inventors
75Inventor score
Filing activity: Jun 30, 1981 → Jul 8, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4901173A | Apparatus for coupling record disk to disk drive | Physics | 83 | Expired |
| US4980786A | Method and apparatus for improved thermal isolation and stability of disk drives | Physics | 46 | Expired |
| US4743989A | Plural magnetic disk assembly | Physics | 43 | Expired |
| US4658318A | Magnetic disk cartridge having improved locking mechanism and ringing pad | Physics | 21 | Expired |
| US4663686A | Head cleaning cartridge for magnetic disk drive | Physics | 20 | Expired |
| US4769733A | Wipers for pair of stabilized magnetic disks | Physics | 18 | Expired |
| US4536764A | Method of counting multiple targets in the post detection processing of a radar | Physics | 17 | Expired |
| US4794480A | Bernoulli plate in cartridge | Physics | 17 | Expired |
| US6687215B1 | Low profile and medium protecting cartridge assembly | Physics | 13 | Expired |
| US7825573B2 | 14 mm extension spark plug | Electricity | 11 | Active |
| US5057954A | Disk drive head lift mechanism | Physics | 11 | Expired |
| US6632310B2 | Disk drive actuator and method of making same | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6914868B1 | Low profile optical head | Physics | 8 | Expired |
| US6717893B1 | Laser thermal management system | Physics | 7 | Expired |
| US4768124A | Record disk cartridge with flexible pad | Physics | 5 | Expired |
| US7337452B2 | Tilt focus mechanism for an optical drive | Physics | 4 | Expired |
| US8237341B2 | Spark ignition device with bridging ground electrode and method of construction thereof | Electricity | 3 | Active |
| US4420782A | Thermal compensation for magnetic head assembly | Physics | 3 | Expired |
| US6817026B2 | Magnetic hub assembly for data storage disk | Physics | 3 | Expired |
| US7521849B2 | Spark plug with welded sleeve on electrode | Electricity | 3 | Active |
| US6826138B2 | Method for aligning actuator assembly to a base in a miniature optical disk drive | Emerging Cross-Sectional Technologies | 2 | Expired |
| US9190116B2 | Hard disc drive cover seal | Emerging Cross-Sectional Technologies | 2 | Active |
| US6901598B1 | Tilt focus method and mechanism for an optical drive | Physics | 2 | Expired |
| US7227817B1 | Low profile optical head | Physics | 2 | Expired |
| US6631113B1 | Continuous flexible connection method for miniature optical head | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.