David Alan Ackerman
54Patents
14h-index
71Co-inventors
87Inventor score
Filing activity: May 13, 1985 → Feb 1, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4684883A | Method of manufacturing high-quality semiconductor light-emitting devices | Electricity | 98 | Expired |
| US6384947B1 | Two path digital wavelength stabilization | Electricity | 60 | Expired |
| US6291813A | Method and system for deriving a control signal for a frequency stabilized optical source | Electricity | 50 | Expired |
| US5181216A | Photonics module apparatus | Electricity | 44 | Expired |
| US6384963B2 | Optical communication system with co-propagating pump radiation for raman amplification | Electricity | 43 | Expired |
| US4892374A | Article comprising an opto-electronic device and an optical waveguide coupled thereto, and method of making the article | Physics | 37 | Expired |
| US5124281A | Method of fabricating a photonics module comprising a spherical lens | Electricity | 31 | Expired |
| US8830340B2 | System and method for high performance image processing | Electricity | 30 | Active |
| US5023881A | Photonics module and alignment method | Electricity | 28 | Expired |
| US6064681A | Wavelength stabilized, tunable optical transmitter with high SMSR | Electricity | 23 | Expired |
| US9836648B2 | Iris biometric recognition module and access control assembly | Emerging Cross-Sectional Technologies | 19 | Active |
| US9131141B2 | Image sensor with integrated region of interest calculation for iris capture, autofocus, and gain control | Electricity | 17 | Active |
| US9514365B2 | Image sensor with integrated region of interest calculation for iris capture, autofocus, and gain control | Electricity | 16 | Active |
| US9836647B2 | Iris biometric recognition module and access control assembly | Emerging Cross-Sectional Technologies | 14 | Active |
| US6028881A | Wavelength selectable laser source | Electricity | 14 | Expired |
| US10042994B2 | Validation of the right to access an object | Emerging Cross-Sectional Technologies | 14 | Active |
| US5111475A | Analog optical fiber communication system, and laser adapted for use in such a system | Electricity | 13 | Expired |
| US6186937A | Method and device for obtaining a desired phase of optical characteristic of a fabry-perot etalon | Physics | 13 | Expired |
| US6215801A | Wavelength stabilized laser | Electricity | 12 | Expired |
| US10025982B2 | Collecting and targeting marketing data and information based upon iris identification | Emerging Cross-Sectional Technologies | 11 | Active |
| US6486999B1 | Using crystalline materials to control the thermo-optic behavior of an optical path | Electricity | 10 | Expired |
| US5285468A | Analog optical fiber communication system, and laser adapted for use in such a system | Electricity | 10 | Expired |
| US4982333A | Capacitance guided assembly of parts | Electricity | 9 | Expired |
| US5506859A | Article comprising a DFB laser with loss coupling | Electricity | 6 | Expired |
| US5052015A | Phase shifted distributed feedback laser | Electricity | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.