The Patent Finder
MA

Masimo Corporation

Filings on record here from 2001, where this site's data begins
OverviewNotableFeesChangesFamiliesPatent listSources & methods

751 patents currently held

80 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
125 more records may belong here and await a decision; they are not counted.

The next term ends in Nov 2026. from the record

Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
213
Ending by 2030
Nov 2026
Next term end
287
Patent families

When these terms end

Held patents by the year their term ends
notable patents fee due within 90 days all others Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Flowometry in Optical Coherence Tomography for Analyte Level Estimation US 10,368,787
Cited by 654 later US patents, top 1% of utility patents granted in 2019 in our data. Protection runs to 2029. A terminal disclaimer caps this term to an earlier patent's.
Ends Mar 2029 · High confidence Also notable
Multi-Stream Sensor Front Ends for Noninvasive Measurement of Blood Constituents US 8,909,310
Cited by 561 later US patents, top 1% of utility patents granted in 2014 in our data, and renewed at every maintenance window due so far. Protection runs to 2029.
Ends Aug 2029 · High confidence Also notable
Multi-Stream Sensor for Noninvasive Measurement of Blood Constituents US 8,203,704
Cited by 801 later US patents, top 1% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2030.
Ends Jan 2030 · High confidence

Fee deadlines

Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
  • 7 fees due Nov 16 to 28, 2026 · next Nov 16
  • 11 fees due Dec 4 to 30, 2026 · next Dec 4
  • 14 fees due Jan 2 to 30, 2027 · next Jan 2
  • 14 fees due Feb 6 to 22, 2027 · next Feb 6
  • 14 fees due Mar 1 to 24, 2027 · next Mar 1
  • 8 fees due Apr 6 to 30, 2027 · next Apr 6
  • 12 fees due May 7 to 28, 2027 · next May 7
  • 11 fees due Jun 3 to 26, 2027 · next Jun 3
  • 16 fees due Jul 2 to 30, 2027 · next Jul 2
  • 10 fees due Aug 4 to 25, 2027 · next Aug 4
  • 11 fees due Sep 3 to 30, 2027 · next Sep 3
  • 18 fees due Oct 2 to 30, 2027 · next Oct 2
  • 6 fees due Nov 3 to 12, 2027 · next Nov 3

Which patents, and when each one lapses · Pro

Recent changes

What they patent

The 5 largest of its 287 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
System and Method for Creating a Stable Optical Interface61 in forceto May 2033
Medical Monitoring System17 in forceto Mar 2034
Medical Monitoring Hub11 in forceto Aug 2034
Display Screen or Portion Thereof with a Graphical User Interface10 in forceto Sep 2039
Non-Invasive Physiological Sensor Cover10 in forceto Aug 2031

Patents held now

Soonest term end first.
PatentTitleStatusExpiresConfidence
US 10,939,877Robust Alarm System
In force
 · High confidence
In forceHigh confidence
US 11,839,498Robust Alarm System
In force
 · High confidence
In forceHigh confidence
US 8,996,085Robust Alarm System
In force
 · High confidence
In forceHigh confidence
US 8,285,316Multi-Users Real-Time Transcoding System and Method for Multimedia Sessions
In force
 · High confidence
In forceHigh confidence
US 9,375,185Systems and methods for acquiring calibration data usable in a pulse oximeter
In force
 · Medium confidence
In forceMedium confidence
US 8,447,374Systems and Methods for Determining Blood Oxygen Saturation Values Using Complex Number Encoding
In force
 · High confidence
In forceHigh confidence
US 10,226,576Sepsis Monitor
In force
 · Low confidence
In forceLow confidence
US 12,691,223Sepsis Monitor
In force
 · Medium confidence
In forceMedium confidence
US 8,353,842Portable Patient Monitor
In force
 · Medium confidence
In forceMedium confidence
US 9,566,019Respiratory Monitoring
In force
 · High confidence
In forceHigh confidence
10 of 751 patents shown.
Pro members see all 751.
Pro members: see all 751 patents
Also on record, not counted in the 751: 80 patents in force now held by others · 221 patents ended · 146 applications pending · 139 applications abandoned. List them

Sources and methods

Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Export every term end as CSV · Pro
The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited