Inventor · Colorado Springs, CO, US

Alexander Chan

31Patents
15h-index
7Co-inventors
74Inventor score

Filing activity: Jun 19, 1984 → May 24, 2024

Most-cited inventions

PatentTitleAreaCited byStatus
US4652047A Folding chairs Human Necessities 28 Expired
US9307908B2 Measuring psychological stress from cardiovascular and activity signals Human Necessities 26 Active
US9655559B2 Automated sleep staging using wearable sensors Human Necessities 20 Active
US9980678B2 Psychological acute stress measurement using a wireless sensor Human Necessities 20 Active
US8614630B2 Fall detection using sensor fusion Physics 20 Active
US6722750B2 Foldable cabinet Human Necessities 19 Expired
US9999376B2 Determining body postures and activities Physics 17 Active
US9632981B2 Calibration of a chest-mounted wireless sensor device for posture and activity detection Physics 17 Active
US10448849B2 Contextual heart rate monitoring Human Necessities 16 Active
US10617325B2 Respiratory rate measurement using a combination of respiration signals Human Necessities 16 Active
US10422814B2 Fall detection using machine learning Physics 16 Active
US9788778B2 Measuring psychological stress from cardiovascular and activity signals Human Necessities 16 Active
US9471541B1 Determining a time period a person is in bed Physics 16 Active
US10317427B2 Calibration of a chest-mounted wireless sensor device for posture and activity detection Physics 16 Active
US10383562B2 Measuring psychological stress from cardiovascular and activity signals Human Necessities 16 Active
US9855003B2 Measuring psychological stress from cardiovascular and activity signals Human Necessities 15 Active
US9872634B2 Respiratory rate measurement using a combination of respiration signals Human Necessities 15 Active
US10213146B2 Measuring psychological stress from cardiovascular and activity signals Human Necessities 15 Active
US10433781B2 Measuring psychological stress from cardiovascular and activity signals Human Necessities 15 Active
US10324109B2 Determining a time period a person is in bed Physics 15 Active
US6698828B1 Folding chair Human Necessities 9 Expired
US6297949A Recessed bezel apparatus Physics 5 Expired
US6877804B2 Folding chair Human Necessities 2 Expired
US11278216B2 Method and device for determining step count Physics 0 Active
US10719574B2 Calibration of a chest-mounted wireless sensor device for posture and activity detection Physics 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.