Assignee
PPM INC
US·11 granted patents·1,030 citations·filing 1978–2000
Top patents by PatentIndex Score
11 records- 0197US6269246B1Location determination using RF fingerprintingPPM INC·Filed 1998·Granted Jul 31, 2001·419 cites·19 claims
- 0293US4512060AApparatus and methods for aeromechanical and electrodynamic release and separation of foreign matter from fiberPPM INC·Filed 1983·Granted Apr 23, 1985·46 cites·14 claims
- 0392US4473296ASystem and method and apparatus for a continuous aerosol monitor (CAM) using electro-optical weighing for general aerosolsPPM INC·Filed 1982·Granted Sep 25, 1984·79 cites·39 claims
- 0491US6591112B1Communication system and device using dynamic receiver addressingPPM INC·Filed 2000·Granted Jul 8, 2003·118 cites·21 claims
- 0589US6115605ACommunication system and device using dynamic receiver addressingPPM INC·Filed 1997·Granted Sep 5, 2000·203 cites·16 claims
- 0689US4249244AElectro-optical system and method and apparatus for providing automatically-compensating, traceable calibration and zeroing for light scattering devicesPPM INC·Filed 1978·Granted Feb 3, 1981·51 cites·74 claims
- 0785US4686744AMethods for aeromechanical and electrodynamic release and separation of foreign matter from fiberPPM INC·Filed 1986·Granted Aug 18, 1987·28 cites·31 claims
- 0883US4631781AConditioned gas flow methods for processing and cleaning fiber, including aeromechanical and electrodynamic release and separationPPM INC·Filed 1986·Granted Dec 30, 1986·25 cites·13 claims
- 0982USD282767SFilter unitPPM INC·Filed 1982·Granted Feb 25, 1986·17 cites·1 claims
- 1081US4881957AAir filtration units and methods employing dust as filtration media and air flow rate as a directly controlled parameterPPM INC·Filed 1983·Granted Nov 21, 1989·38 cites·12 claims
- 1138US4396286AElectro-optical system and method and apparatus for providing automatically-compensating, traceable calibration and zeroing for light scattering devicesPPM INC·Filed 1980·Granted Aug 2, 1983·6 cites·11 claims
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