Coherent's Patent Record Peaked Fifteen Years Before Its Series B
Coherent holds 307 patent families: 235 granted and 72 published and pending. Filing began in 2005, with the most recent published filing dated 2025-08-13. The families appear in 16 patent offices: United States, Europe, China, Japan and South Korea.Patent figures from Google Patents Public Data, reviewed 2026-09-17. Funding: $75M Series B, 2022-04-01. Assignee matching for this company is ambiguous and the figures need manual confirmation.
A $75M Series B landed in April 2022. By then Coherent's filing rate had been falling for a decade, from forty families in 2007 to three that year. The question is what a portfolio built mostly before 2013 is still doing for the company that owns it.
Money arrives seventeen years after the first filing
April 2022. A $75M Series B, tagged to cloud computing. Take that date and hold it, because it is the only recent number in this story that points upward. Coherent's first patent family was filed on 19 January 2005. By the month the round was announced, the company had been filing continuously for seventeen years and had already put most of its record on the books.
Funding events usually sit near the start of a patent story. Capital arrives, hiring follows, filings climb. Here the sequence runs the other way. The round lands late in a build that was largely finished, against a portfolio of 307 families that was already 77 percent granted. Whatever the money was for, it was not the thing that produced the bulk of this record.
Two hundred and thirty-five of them already granted
Three hundred and seven families. Two hundred and thirty-five granted, drawn solid. Seventy-two still published and pending, drawn thin. A 77 percent grant rate across twenty years of prosecution is a settled portfolio, not a speculative one. Most of these arguments have already been made to an examiner and won.
Three hundred and fifty-one inventors are named across the arc. The densest names are Spinelli Luis A on 27 families, Caprara Andrea on 25 and Govorkov Sergei V on 24. That is a wide bench rather than a founding pair, and the concentration at the top is modest: no single inventor touches even a tenth of the record. This was built by an organisation, over years, in volume.
A 77 percent grant rate is a settled portfolio, not a speculative one.
Forty in 2007, three in the funding year
The bars rise fast and early. Twenty-nine families in 2005, thirty-two in 2006, forty in 2007. That is the peak. From there it steps down almost every year: twenty-six in 2009, twenty in 2012, seven in 2014. Between 2005 and 2012 Coherent filed 224 families, seventy-three percent of everything it has. The remaining thirteen years account for eighty-three.
Mark the funding year. 2022 shows three first filings. 2023 shows two. The shaded window at the right edge is the eighteen-month publication lag, so the last bars will grow, and 2024 already stands at six, the highest count since 2016. Whether that is noise or a floor being left behind is the only open question the chart poses.
Four organisations, one hundred and ninety-seven citations
The nodes connecting back are not obscure. NLIGHT INC cites these filings 60 times. HAND HELD PROD INC cites them 50 times. TRUMPF LASER & SYSTEMTECHNIK GMBH cites them 44 times, and GIGAPHOTON INC 43. That is 197 citations from four organisations alone, pointing back at a body of work that was largely filed before 2013.
Citations are examiners and applicants recording what came first. Old filings that keep getting cited are old filings that keep being relevant to what other people are trying to claim now. TRUMPF LASER & SYSTEMTECHNIK GMBH appears twice in this brief: as a citing organisation and as one of the assignees filing in the same CPC groups over the last five years. The record shows both, and nothing more.
Sixteen offices, and some of them are unusual
US, EP, CN, JP, KR. The expected five. Then DE and GB filed nationally alongside the European route, plus CA, BR, TW and IL. Then the tail: MX, ES, DK, LT and TR. Lithuania and Denmark are not places a company files by default. Each of those is a deliberate decision with a fee attached.
Sixteen offices across 307 families means the coverage is selective rather than blanket, and the selection was made family by family over twenty years. Read alongside the filing curve, the geography says the same thing the grant rate does. This was a portfolio built to be kept, prosecuted through, and maintained in specific jurisdictions, not a volume play filed cheaply and abandoned.
What the newest four titles have in common
Here is the plain version. Coherent front-loaded its patent record between 2005 and 2012 and has been filing at a fraction of that rate ever since. The value of the portfolio now rests on 235 granted families that are, on average, old, and on the evidence that other organisations still cite them in the hundreds.
But look at what came recently. Sub-190 nanometer deep-ultraviolet laser beam generation. Multi-domain lithium niobate crystals and see-through near-eye display devices. See-through near-eye display device with crystalline waveguide. Single-step laser cutting and pre-welding of a metal foil stack. Four titles, and only one of them looks like the 2007 portfolio. The 2024 uptick to six families is small. It is also the first thing in fifteen years pointing the other way.
Four recent titles, and only one looks like the 2007 portfolio.
Is the recent uptick a rebuild or noise?
Three things you might already know about Coherent. None of them settles the question on its own, because a single year of filings, a single new subject area or a single grant can each be explained away.
A record being maintained
The 235 granted families still carry citations from four organisations. That is an asset, but it is a finished one.
What the newest four titles have in common
Does the 2024 count of six first filings hold or exceed itself in 2025 once the publication window clears?
Do the near-eye display and lithium niobate titles grow into a family cluster, or stay as isolated filings?
Which offices do the post-2022 families enter, and does the sixteen-office footprint widen or narrow?
Do the three most frequently named inventors appear on the recent filings, or are new names carrying them?
Following those four would tell you whether the Series B bought a second filing cycle or the maintenance of a first one.
Common questions
How many patents does Coherent have?
Coherent holds 307 patent families as reviewed in 2026-09: 235 granted and 72 published and pending.
How many of Coherent's patents are granted?
235 of the 307 families are granted, or 77 percent. The remaining 72 are published and still under examination.
What technology do Coherent's patents cover?
Coherent's claims cluster in lasers (H01S), optical elements (G02B) and soldering and welding (B23K). Recent filing titles include "Sub-190 nanometer deep-ultraviolet laser beam generation" and "Multi-domain lithium niobate crystals and see-through near-eye display devices".
Where has Coherent filed patents?
Coherent's families appear in 16 patent offices: United States, Europe, China, Japan, South Korea and Germany.
Which companies file patents in the same areas as Coherent?
The same CPC groups drew DISCO CORP, SAMSUNG DISPLAY CO LTD, TRUMPF LASER & SYSTEMTECHNIK GMBH and TRUMPF WERKZEUGMASCHINEN SE CO KG over the last five years. Shared classification indicates a common technology field rather than direct competition.
Who cites Coherent's patents?
Patent records from NLIGHT INC, HAND HELD PROD INC, TRUMPF LASER & SYSTEMTECHNIK GMBH and GIGAPHOTON INC cite Coherent's filings. A citation indicates a reference to the work, not evidence of commercial use.
Who invented Coherent's patents?
351 inventors are named across the portfolio. The most frequently named is SPINELLI LUIS A. Inventor names do not establish ownership, which is determined by assignment records.
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