William Happer
26Patents
13h-index
29Co-inventors
81Inventor score
Filing activity: Jul 9, 1974 → Jun 18, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5545396A | Magnetic resonance imaging using hyperpolarized noble gases | Emerging Cross-Sectional Technologies | 139 | Expired |
| US5642625A | High volume hyperpolarizer for spin-polarized noble gas | Emerging Cross-Sectional Technologies | 90 | Expired |
| US5809801A | Cryogenic accumulator for spin-polarized xenon-129 | Emerging Cross-Sectional Technologies | 71 | Expired |
| US7102451B2 | Method and system for operating an atomic clock with alternating-polarization light | Electricity | 64 | Expired |
| US5860295A | Cryogenic accumulator for spin-polarized xenon-129 | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5612103A | Coatings for production of hyperpolarized noble gases | Emerging Cross-Sectional Technologies | 36 | Expired |
| US7323941B1 | Method and system for operating a laser self-modulated at alkali-metal atom hyperfine frequency | Physics | 36 | Expired |
| US5785953A | Magnetic resonance imaging using hyperpolarized noble gases | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5789921A | Magnetic resonance imaging using hyperpolarized noble gases | Emerging Cross-Sectional Technologies | 26 | Expired |
| US6888780B2 | Method and system for operating an atomic clock with simultaneous locking of field and frequency | Physics | 22 | Expired |
| US6241966A | Magnetic resonance imaging using Hyperpolarized noble gases | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4005355A | Method and apparatus for stimulating narrow line resonance conditions | Physics | 15 | Expired |
| US8009520B2 | Method and system for operating an atomic clock using a self-modulated laser with electrical modulation | Physics | 14 | Active |
| US6919770B2 | Method and system for operating an atomic clock with reduced spin-exchange broadening of atomic clock resonances | Physics | 11 | Expired |
| US6123919A | Magnetic resonance imaging using hyperpolarized noble gases | Physics | 11 | Expired |
| US6648130B1 | Hyperpolarized gas transport and storage devices and associated transport and storage methods using permanent magnets | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6318092A | Alkali metal hybrid spin-exchange optical pumping | Physics | 10 | Expired |
| US7825736B2 | Method for suppressing light shift in optical pumping systems | Physics | 7 | Active |
| US6593144B2 | Magnetic resonance imaging using hyperpolarized noble gases | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6551559B1 | Sol-gel coated polarization vessels | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7439814B2 | Method and system for operating an atomic clock with simultaneous control of frequency and magnetic field | Physics | 7 | Active |
| US7902927B2 | System and method for modulating pressure in an alkali-vapor cell | Physics | 6 | Active |
| US7931794B2 | Method and system for electrolytic fabrication of atomic clock cells | Physics | 3 | Active |
| US7066319B2 | Hyperpolarized gas transport and storage devices and associated transport and storage methods using permanent magnets | Emerging Cross-Sectional Technologies | 3 | Expired |
| US8020694B2 | Hyperpolarized gas transport and storage devices and associated transport and storage methods using permanent magnets | Emerging Cross-Sectional Technologies | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.