Ask Patents Meta
to customize your list.
more stack exchange communities
Reputation and Badges
Start here for a quick overview of the site
Detailed answers to any questions you might have
Discuss the workings and policies of this site
Learn more about Stack Overflow the company
Learn more about hiring developers or posting ads with us
tag has no usage guidance.
Secure telephone-based payments - Patent application - Prior art request
US patent application 2220110228919 (USPTO link) seems to be trying to patent an on/off switch for DTMF audio on telephone networks. The key claims are these (effectively the first three): A ...
Jul 24 '13 at 9:31
newest pci-dss questions feed
Search patents with Google
Hot Network Questions
How are 100 Mario Challenges difficulty determined?
Can I describe in my own word few experiments from some academic papers to write a popular science book?
Does Raspberry Pi cluster make sense for a small rendering farm
What are these elements on the back of a Boeing 737?
In a sign language dictionary, should video loop by default?
Upright quote in DejaVu Serif
Will it damage my MacBook if I put it in the fridge to cool it down?
I was tricked on Facebook into downloading an obfuscated script
Rube Goldberg Hello World
Axiom of Choice: Where is falsity in argument and understanding to put is as Axiom?
Is there a reason Hillary Clinton's logo has hidden notches?
Is there any D&D 5e art for the Acolyte background/monster?
Did Albert Einstein really receive this rejection letter?
Coffee-break Puzzle: Where does the Driver Sit?
What happens when Reaper loses sight of his Shadow Step destination?
Aligning text in a minipage environment with the top of a table in a tabular environment
Migrating Dungeon Monsters / Why do monsters not leave the dungeons?
Employees ignoring procedure changes
Word that means non-human animals?
Brainf*** cat - encode a file as a brainf*** program
Warlock and Hellfire Warlock stacking for Eldritch blast in D&D 3.5
Is it worth using a hotshoe cover?
Will users misunderstand "Last week", "Last year", "Last month" etc?
What does it mean when people say a cost function is something you want to minimize?
more hot questions
Life / Arts
Culture / Recreation
TeX - LaTeX
Unix & Linux
Ask Different (Apple)
Geographic Information Systems
Science Fiction & Fantasy
Movies & TV
Seasoned Advice (cooking)
Personal Finance & Money
English Language & Usage
Mi Yodeya (Judaism)
Cross Validated (stats)
Theoretical Computer Science
Meta Stack Exchange
Stack Overflow Careers
site design / logo © 2016 Stack Exchange Inc; user contributions licensed under
cc by-sa 3.0