§ The team
Ten people · One floor · King’s Cross
Small enough to know
every file.
Ten of us, on one floor in King’s Cross — five minutes from the Knowledge Quarter. Every matter is run by a partner, and whoever picks up the phone has already read the file.
§ Who acts
Nobody hands
your file on.
§ Who acts
Nobody hands
your file on.
§ The file
Five entries · Read in order
Read the file
before you instruct.
Where each of us trained, what we act on, and a direct line that reaches the person rather than a shared inbox. Whoever takes your call runs the matter — through the correspondence, the negotiation and, if it comes to it, the hearing.
§ Index
05 entries
Entry 01 / 05
Admitted 2004
London
§ 01 · Patents
§ 01 · Patents
Helena Voss
/ˈhɛl.ɪ.nə ˈvɒs/ · noun
Founding partner · Patents
“
A patent is only as strong as the sentence a judge reads aloud. I write every claim for that day.
Direct line
Helena founded Lexicon after twelve years in a City IP practice. She drafts and prosecutes in semiconductors, batteries and medical devices, and is instructed when a portfolio has to survive a validity challenge — usually because she drafted it to.
Education
PhD, Condensed Matter Physics — Imperial College London
PhD, Condensed Matter Physics — Imperial College London
Languages
English, German
English, German
Acts for
Deep-tech founders, university spin-outs and listed manufacturers
Deep-tech founders, university spin-outs and listed manufacturers
Entry 02 / 05
Admitted 2008
London
§ 02 · Litigation
§ 02 · Litigation
Tobias Achebe
/təˈbaɪ.əs əˈtʃeɪ.beɪ/ · noun
Partner · Patent litigation
“
Most infringement actions are won in the first month — in what you preserve, and in what you choose not to argue.
Direct line
Tobias designed RF hardware for four years before he qualified. He leads Lexicon’s contentious patent work before the Patents Court and the Unified Patent Court, from pre-action strategy to appeal, and runs the technical evidence on every matter himself.
Education
MEng, Electronic Engineering — University of Manchester
MEng, Electronic Engineering — University of Manchester
Languages
English, French, Igbo
English, French, Igbo
Acts for
Patentees enforcing hardware and standard-essential claims, and the companies facing them
Patentees enforcing hardware and standard-essential claims, and the companies facing them
Entry 03 / 05
Admitted 2011
London
§ 03 · Technology
§ 03 · Technology
Jasleen Sandhu
/ˈdʒʌs.liːn ˈsʌn.duː/ · noun
Partner · Technology & data
“
Read the licence before you read the code. Then read the training data’s licence — that is the one that bites.
Direct line
Jasleen wrote production software for a decade before law. She advises on software and SaaS licensing, open-source compliance and the rights in AI training data, and is the person engineering teams call when an acquirer’s diligence turns up a copyleft dependency.
Education
BSc, Computer Science — University of Warwick
BSc, Computer Science — University of Warwick
Languages
English, Punjabi, Hindi
English, Punjabi, Hindi
Acts for
SaaS businesses, AI developers and the investors behind them
SaaS businesses, AI developers and the investors behind them
Entry 04 / 05
Admitted 2009
London
§ 04 · Brands
§ 04 · Brands
Marcus Lindqvist
/ˈmɑː.kəs ˈlɪnd.kvɪst/ · noun
Partner · Brands & designs
“
A brand is cheap to clear and expensive to rescue. I would much rather meet you before the launch.
Direct line
Marcus spent six years in brand strategy before law, which is why he asks about the roadmap before the register. He runs clearance and filing programmes across the UKIPO, EUIPO and WIPO, and the enforcement that follows — oppositions, passing off and design infringement.
Education
LLM, Intellectual Property — Queen Mary University of London
LLM, Intellectual Property — Queen Mary University of London
Languages
English, Swedish
English, Swedish
Acts for
Consumer brands, fashion houses and product designers
Consumer brands, fashion houses and product designers
Entry 05 / 05
Admitted 2017
London
§ 05 · Life sciences
§ 05 · Life sciences
Oona Keating
/ˈuː.nə ˈkiː.tɪŋ/ · noun
Senior associate · Life sciences
“
In biologics the science moves faster than the case law. Our job is to make sure your claims keep up.
Direct line
Oona came to Lexicon from the bench, with a PhD in molecular biology. She runs supplementary protection certificates, EPO oppositions and freedom-to-operate work for biologics, and sits second chair on the firm’s life-sciences litigation.
Education
PhD, Molecular Biology — Trinity College Dublin
PhD, Molecular Biology — Trinity College Dublin
Languages
English, Irish
English, Irish
Acts for
Biotech spin-outs, CROs and specialty pharma
Biotech spin-outs, CROs and specialty pharma
Ask for the partner
who will actually act.
No charge · No conflict · Under NDA
§ The team
Ten people · One floor · King’s Cross
Small enough to know
every file.
Ten of us, on one floor in King’s Cross — five minutes from the Knowledge Quarter. Every matter is run by a partner, and whoever picks up the phone has already read the file.
§ Who acts
Nobody hands
your file on.
§ Who acts
Nobody hands
your file on.
§ The file
Five entries · Read in order
Read the file
before you instruct.
Where each of us trained, what we act on, and a direct line that reaches the person rather than a shared inbox. Whoever takes your call runs the matter — through the correspondence, the negotiation and, if it comes to it, the hearing.
§ Index
05 entries
Entry 01 / 05
Admitted 2004
London
§ 01 · Patents
§ 01 · Patents
Helena Voss
/ˈhɛl.ɪ.nə ˈvɒs/ · noun
Founding partner · Patents
“
A patent is only as strong as the sentence a judge reads aloud. I write every claim for that day.
Direct line
Helena founded Lexicon after twelve years in a City IP practice. She drafts and prosecutes in semiconductors, batteries and medical devices, and is instructed when a portfolio has to survive a validity challenge — usually because she drafted it to.
Education
PhD, Condensed Matter Physics — Imperial College London
PhD, Condensed Matter Physics — Imperial College London
Languages
English, German
English, German
Acts for
Deep-tech founders, university spin-outs and listed manufacturers
Deep-tech founders, university spin-outs and listed manufacturers
Entry 02 / 05
Admitted 2008
London
§ 02 · Litigation
§ 02 · Litigation
Tobias Achebe
/təˈbaɪ.əs əˈtʃeɪ.beɪ/ · noun
Partner · Patent litigation
“
Most infringement actions are won in the first month — in what you preserve, and in what you choose not to argue.
Direct line
Tobias designed RF hardware for four years before he qualified. He leads Lexicon’s contentious patent work before the Patents Court and the Unified Patent Court, from pre-action strategy to appeal, and runs the technical evidence on every matter himself.
Education
MEng, Electronic Engineering — University of Manchester
MEng, Electronic Engineering — University of Manchester
Languages
English, French, Igbo
English, French, Igbo
Acts for
Patentees enforcing hardware and standard-essential claims, and the companies facing them
Patentees enforcing hardware and standard-essential claims, and the companies facing them
Entry 03 / 05
Admitted 2011
London
§ 03 · Technology
§ 03 · Technology
Jasleen Sandhu
/ˈdʒʌs.liːn ˈsʌn.duː/ · noun
Partner · Technology & data
“
Read the licence before you read the code. Then read the training data’s licence — that is the one that bites.
Direct line
Jasleen wrote production software for a decade before law. She advises on software and SaaS licensing, open-source compliance and the rights in AI training data, and is the person engineering teams call when an acquirer’s diligence turns up a copyleft dependency.
Education
BSc, Computer Science — University of Warwick
BSc, Computer Science — University of Warwick
Languages
English, Punjabi, Hindi
English, Punjabi, Hindi
Acts for
SaaS businesses, AI developers and the investors behind them
SaaS businesses, AI developers and the investors behind them
Entry 04 / 05
Admitted 2009
London
§ 04 · Brands
§ 04 · Brands
Marcus Lindqvist
/ˈmɑː.kəs ˈlɪnd.kvɪst/ · noun
Partner · Brands & designs
“
A brand is cheap to clear and expensive to rescue. I would much rather meet you before the launch.
Direct line
Marcus spent six years in brand strategy before law, which is why he asks about the roadmap before the register. He runs clearance and filing programmes across the UKIPO, EUIPO and WIPO, and the enforcement that follows — oppositions, passing off and design infringement.
Education
LLM, Intellectual Property — Queen Mary University of London
LLM, Intellectual Property — Queen Mary University of London
Languages
English, Swedish
English, Swedish
Acts for
Consumer brands, fashion houses and product designers
Consumer brands, fashion houses and product designers
Entry 05 / 05
Admitted 2017
London
§ 05 · Life sciences
§ 05 · Life sciences
Oona Keating
/ˈuː.nə ˈkiː.tɪŋ/ · noun
Senior associate · Life sciences
“
In biologics the science moves faster than the case law. Our job is to make sure your claims keep up.
Direct line
Oona came to Lexicon from the bench, with a PhD in molecular biology. She runs supplementary protection certificates, EPO oppositions and freedom-to-operate work for biologics, and sits second chair on the firm’s life-sciences litigation.
Education
PhD, Molecular Biology — Trinity College Dublin
PhD, Molecular Biology — Trinity College Dublin
Languages
English, Irish
English, Irish
Acts for
Biotech spin-outs, CROs and specialty pharma
Biotech spin-outs, CROs and specialty pharma
Ask for the partner
who will actually act.
No charge · No conflict · Under NDA