Registered patent attorney
David E Shifren
Firm
Otterstedt, Ellenbogen & Kammer, LLP
Address
30 Buxton Farms Road
Suite 125
Stamford, CT, 06905
US
Phone
Registered as
Registered patent attorney
Other attorneys at Otterstedt, Ellenbogen & Kammer, LLP
Other patent attorneys in Stamford, Connecticut
- David AkerOhlandt Greeley & Perle, LLP
- Jacob J. AlexanderWhitmyer IP Group
- Richard deGive AllisonHudson Bay Capital Management LP
- Vincent P BarthThe Barth Law Firm, LLC
- Michael S BartoloneUSPTO Reg. 65239
- Richard J BasileMurtha Cullina LLP
- Ceyhan G. BeckhamUSPTO Reg. 83566
- David K BensonHenkel Corporation
Frequently asked
Frequently asked about David E Shifren
Is David E Shifren a registered patent attorney?
Yes. David E Shifren is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 59329). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is David E Shifren located?
David E Shifren's office is in Stamford, Connecticut (06905). Affiliated with Otterstedt, Ellenbogen & Kammer, LLP.
What firm does David E Shifren work at?
David E Shifren is listed as affiliated with Otterstedt, Ellenbogen & Kammer, LLP on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact David E Shifren?
David E Shifren's office phone (per the USPTO public roster) is 646-858-1380. Verify availability and intake details directly with the firm before sending privileged materials.
Should I prepare anything before contacting a patent attorney?
Yes — most patent attorneys quote based on a brief. Persoona's intellectual property module generates a prior-art analysis, defensibility scorecard, and a draft USPTO filing package so you arrive with a brief, not a blank slate. Free to run.
Profile sourced from the USPTO OEDCI Practitioner Roster. Persoona did not provide, edit, or curate this data — every field is pulled directly from the public roster.