Robert A. Hoffman
27Patents
19h-index
37Co-inventors
81Inventor score
Filing activity: Mar 25, 1975 → Mar 11, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6067480A | Method and apparatus for in-situ formation of three-dimensional solid objects by extrusion of polymeric materials | Performing Operations; Transporting | 181 | Expired |
| US4284412A | Method and apparatus for automated identification and enumeration of specified blood cell subclasses | Emerging Cross-Sectional Technologies | 164 | Expired |
| US5528045A | Particle analyzer with spatially split wavelength filter | Physics | 155 | Expired |
| US5504337A | Method and apparatus for performing phase fluorescence lifetime measurements in flow cytometry | Physics | 151 | Expired |
| US6813017B1 | Apparatus and method employing incoherent light emitting semiconductor devices as particle detection light sources in a flow cytometer | Physics | 125 | Expired |
| US5880474A | Multi-illumination-source flow particle analyzer with inter-location emissions crosstalk cancelation | Physics | 117 | Expired |
| US5317162A | Apparatus and method for phase resolved fluorescence lifetimes of independent and varying amplitude pulses | Physics | 99 | Expired |
| US4492752A | Method for discriminating between unstained and absorbing dye stained cells | Emerging Cross-Sectional Technologies | 60 | Expired |
| US7301469B1 | Remotely activated trail marker system and its method of use | Physics | 58 | Expired |
| US4596464A | Screening method for red cell abnormality | Physics | 42 | Expired |
| US4284355A | Automated method for cell volume determination | Physics | 37 | Expired |
| US5076472A | Cleaning cycle for flow cytometers | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5087295A | Cleaning cycle for flow cytometers | Performing Operations; Transporting | 35 | Expired |
| US6329158A | Use of dimly fluorescing nucleic acid dyes in the identification of nucleated cells | Physics | 33 | Expired |
| US5776709A | Method for preparation and analysis of leukocytes in whole blood | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4062619A | Variable background intensity apparatus for imaging systems | Physics | 24 | Expired |
| US4665553A | Methods and apparatus for analysis of particles and cells | Physics | 22 | Expired |
| US4200353A | Modulation contrast microscope with three regions | Physics | 21 | Expired |
| US8415161B2 | Instrument setup system for a fluorescence analyzer | Emerging Cross-Sectional Technologies | 20 | Active |
| US8865470B2 | Instrument setup system for a fluorescence analyzer | Emerging Cross-Sectional Technologies | 15 | Active |
| US4303340A | Optical micrometer measuring system | Physics | 13 | Expired |
| US4475236A | Method for counting overlapping cell populations in a distribution histogram | Physics | 13 | Expired |
| US4581334A | Simultaneous detection of leukocyte phagocytic and killing ability | Chemistry; Metallurgy | 12 | Expired |
| US4200354A | Microscopy systems with rectangular illumination particularly adapted for viewing transparent objects | Physics | 11 | Expired |
| US4688819A | Hitch | Emerging Cross-Sectional Technologies | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.