Adobe and EchoSign sued by RPost for patent infringement

Adobe Systems and EchoSign, the electronic signatures company it announced it is to acquire, were sued on Tuesday by RPost, another electronic signature services company, for alleged infringement of five of its patents relating to electronic signature services.

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Adobe Systems and EchoSign, the electronic signatures company it announced it is to acquire, were sued on Tuesday by RPost, another electronic signature services company, for alleged infringement of five of its patents relating to electronic signature services.

RPost, which said it was in discussionsfor "a collaborative product alliance" with Adobe before its acquisition of EchoSign, has asked the court to issue an injunction against Adobe to prevent further damages.

Such an injunction would render Adobe's purchase of EchoSign worthless, RPost's CEO Zafar Khan said. "We would consider collaborative product arrangements between Adobe and RPost's products and technologies," he added.

Patent lawsuit

In a complaint filed with the federal court, the patent holders RPost Holdings, RPost Communications and RMail alleged that Adobe and EchoSign have infringed their patents relating to the system and method for verifying delivery and integrity of electronic messages, and the apparatus and method for authenticating the dispatch and contents of documents.

Adobe Systems said that it acquired EchoSign, a web-based provider of electronic signatures and signature automation, and plans to add EchoSign's electronic signature technology to its document exchange services platform.

"We did not anticipate Adobe's acquisition of EchoSign," Khan said. The timing was a surprise, as RPost had engaged in discussions with Adobe just a month before in the context of proposing a collaborative product alliance, he added.

"Had Adobe delayed a week, we would have filed against EchoSign," Khan said. Khan claimed that in the context of the discussions with RPost, Adobe was informed about the company's patent portfolio. "Since they chose to acquire the technology that we deemed to infringe, we included Adobe in the suit," he added.

Legally binding

RPost's Electronic Signature and Registered Email services provide senders legally valid, court admissible evidence of email content, timestamp and delivery, with options to record the recipient's consent to attached contracts with legal electronic signatures, RPost said on Tuesday.

Just typing your name at the bottom of a document or email can have all the legal force of a handwritten signature, if all parties have proof that you are the author of the specific content, RPost said in a statement. But if you don't have that proof, then electronic signing is legally worthless, it added.

The key element in any system of electronic signature is creating a legally meaningful audit trail of every step of the signature process and associating that audit trail with particular electronic document content, RPost said.

When part of that audit trail involves email, it is on RPost's turf, as it pioneered the technology for proof of email and document delivery, including recording recipient reply or signoff on the message content and has the patents to prove it, the company added.

Adobe spokesmen said that it does not comment on pending litigation.

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