How broad can a patent be?
<p>I have trouble understanding how patents work. I understand that they apply to the idea of how something is used. How broad can they be? For example why didn't one person (or company) patent cars in general? e.g. a mode of transportation where passenger sits in a seat and is carried on wheels connected to an engine.</p>

<p>Another example of what I don't get, how come Blackberry didn't patent smartphones so Apple couldn't make any? </p>

<p>A patent can be fairly broad if it meets the requirements, two of the most important being <em>novelty</em> and <em>non-obviousness</em>. However, it is difficult for an idea to be broad and still meet the requirements.</p>

<p>Let's use the Blackberry example. Blackberry almost certainly has some specific patents. But <em>smartphone</em> is way too vague. The desirability for something to be <em>smart</em> is obvious.</p>

<p>What about <em>wireless text messaging</em>? HAM radio operators were sending wireless text messages in the 60s (my father had a setup). So, this fails the <em>novelty</em> requirement, already been done.</p>

<p>Next, consider: <em>text messaging via cellular wireless</em>. You might be able to patent this, but whoever invented cellular technology probably already considered it and beat you to it.</p>

<p>Need to be more specific ...  It would take some research, but I am guessing that Blackberry has a patent for a specific <em>messaging system</em>, i.e, protocols for sending, receiving, and storing messages. But, that won't stop someone else from developing their own messaging system.</p>

<p>Finally, note that in a highly competitive, profitable business such as smartphones, there are many patents, and the patent owners will often believe that another patent is in conflict with theirs. Legal battles can take years to resolve.</p>

<p>Patents can have very broad claims in breakthrough areas. US 2,524,035, the transistor -</p>

<blockquote>
  <ol>
  <li>A circuit element which comprises a block of Semiconductive material of which the body is of one conductivity type and a thin Surface layer is of the opposite conductivity type, an emitter electrode making contact with said layer, a collector electrode making contact with said layer disposed to collect current spreading from Said emitter electrode, and a base electrode making contact with the body of the block.</li>
  </ol>
</blockquote>

patents