Inventions in Door Knockers category

Introduction

Door Knockers is one of those areas that honestly has a lot of new inventions coming up almost every day. Of course, quality is more important than quantity but dont' forget about the element of chance. In higher sample size there is that higher probablity of somethign useful coming up.

Patented Inventions in Door Knockers

  1. Magnetically operated door chime

    Here are few examples in this category: A Magnetically operated door chime, which seems to be dated Mon, 25 Mar 1985 00:00:00 -0800. This one is quite interesting for Door Knockers category. First of all it is very futuristic; I guess everything new that is invented has to be in one way or another futuristic. Anyways, the point here is that this invention has some good potential for future. Inventors of this project were . The idea behind the it is very odd in a good way.

    Let’s say see what the actual authors say about them: United States Patent m Kurtz [ii] Patent Number: 4567846 [45] Date of Patent: Feb. 4, 1986 [54] MAGNETICALLY OPERATED DOOR CHIME [76] Inventor: Thomas D..

    Here is its drawing Magnetically operated door chime

  3. RINGING MECHANISM

    Here are few examples in this category: A RINGING MECHANISM, which seems to be dated Wed, 07 Nov 2007 00:00:00 -0800. This one is quite interesting for Door Knockers category. First of all it is very futuristic; I guess everything new that is invented has to be in one way or another futuristic. Anyways, the point here is that this invention has some good potential for future. Inventors of this project were CHRISTOPHE CLARET S.A.. The idea behind the it is very odd in a good way.

    Let’s say see what the actual authors say about them: .

    Here is its drawing RINGING MECHANISM

  5. Jingle bell

    Here are few examples in this category: A Jingle bell, which seems to be dated Tue, 12 Oct 1999 00:00:00 -0700. This one is quite interesting for Door Knockers category. First of all it is very futuristic; I guess everything new that is invented has to be in one way or another futuristic. Anyways, the point here is that this invention has some good potential for future. Inventors of this project were . The idea behind the it is very odd in a good way.

    Let’s say see what the actual authors say about them: .

    Here is its drawing Jingle bell

  7. Electric bell having a mechanism for supporting electromagnetic unit

    Here are few examples in this category: A Electric bell having a mechanism for supporting electromagnetic unit, which seems to be dated Mon, 25 Aug 1997 00:00:00 -0700. This one is quite interesting for Door Knockers category. First of all it is very futuristic; I guess everything new that is invented has to be in one way or another futuristic. Anyways, the point here is that this invention has some good potential for future. Inventors of this project were . The idea behind the it is very odd in a good way.

    Let’s say see what the actual authors say about them: F i g..

    Here is its drawing Electric bell having a mechanism for supporting electromagnetic unit


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Searching inventions by utalizing United States Patent classification and Google patent search.

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