Ask Patents Meta
to customize your list.
more stack exchange communities
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
tag has no wiki summary.
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 dtmf questions feed
Podcast #61 – The “What Jay’s Done Wrong” Podcast
Search patents with Google
Hot Network Questions
Are there any downsides to scaling down unsharp images?
Why would 《 and 》 be used in a translation?
Is there a ceilling on weather patterns?
One word for "The amount paid to a person A because of the damage caused to him by person B"
Why is initializer_list constructor preferred here?
The Longest Word Made from Chemical Symbols
Quadratics with roots as integers; possible values of a
Indefinite integral of a simple function
How can a spaceship unknowingly interfere with tides on a planet?
Get list of characters in column
Finding prime factors by taking the square root
The treasure hunt
What's the "official" explanation for Harry's (and everyone else's) absence from muggle school?
Migrate user accounts from Azure AD to on-premise AD?
How do I type an 'æ' character?
May I use 'kid boy' the way we use 'baby boy'?
How does the power supply noise generated by digital ICs affect the output of regulator?
Trying to find author of short story called Man Alone
Press any key to pause shell script, press again to resume
Can a lock picker slowly undermine the security of a deadbolt door?
The Moriarty Sentience Problem - A.K.A. Why isn't the Enterprise computer considered sentient?
Kleinberg-Tardos style of book writing
Declining a Job Offer and Added to Blacklist
How do big companies maintain their products' source code without it falling into wrong hands?
more hot questions
Life / Arts
Culture / Recreation
TeX - LaTeX
Unix & Linux
Ask Different (Apple)
Geographic Information Systems
Science Fiction & Fantasy
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 © 2014 stack exchange inc; user contributions licensed under
cc by-sa 3.0