IBM has 11175 pending US patent applications out of which 3250 are in the prosecution cycle for more than 3 years, and 1054 patent applications have been in the prosecution cycle for more than 5 years.
The exhibit below has statistics of pending applications of IBM that are in the prosecution cycle for more than 3 years.
Law Firms Prosecuting These Pending Applications
The table below provides the distribution of 11175 pending applications to the law firms prosecuting these patents. You can check the top law firms that prosecuted most patents for IBM here: Law firms that prosecuted most patents for IBM at the USPTO
| Law Firm | Number of Patents |
| IBM | 4302 |
| Cantor Colburn | 1008 |
| Tutunjian & Bitetto | 731 |
| Scully Scott Murphy & Presser | 403 |
| Amin Turocy & Watson | 315 |
| Roberts Calderon Safran & Cole | 311 |
| Schmeiser Olsen & Watts | 287 |
| Proactive Patents | 279 |
| Griffiths & Seaton | 272 |
| Zilka Kotab | 241 |
| Cuenot Forsythe & Kim | 222 |
| Mcginn Intellectual Property Law Group | 215 |
| Walder Intellectual Property Law | 215 |
| Patterson & Sheridan | 214 |
| Otterstedt Wallace & Kammer | 195 |
| Ryan Mason & Lewis | 192 |
| Edell Shapiro & Finnan | 139 |
| Duke W Yee | 120 |
| Heslin Rothenberg Farley & Mesiti Pc | 89 |
| Fleit Intellectual Property Law | 88 |
| Keohane & D’Alessandro | 87 |
| Foley Hoag Llp | 84 |
| Sherman Ip Llp | 84 |
| Michael J Chang Llc | 71 |
| Law Office Of Jim Boice | 70 |
| Lieberman & Brandsdorfer Llc | 65 |
| Nelson And Nelson | 64 |
| Intelletek Law Group Pllc | 59 |
| Ference & Associates Llc | 58 |
| Harrington & Smith Attorneys At Law Llc | 57 |
| Terrile Cannatti & Chambers Llp | 55 |
| Garlick & Markison | 52 |
| Troutman Pepper Hamilton Sanders Llp | 49 |
| Kunzler Bean & Adamson | 46 |
| David H Judson | 42 |
| F Chau & Associates Llc | 40 |
| Michael Best & Friedrich Llp | 34 |
| Conley Rose Pc | 32 |
| Lou Percello Attorney Pllc | 22 |
| North Shore Patents Pc | 22 |
| Jeffrey S Labaw | 21 |
| Russell Ng Pllc | 21 |
| International Ip Law Group | 20 |
| Dept Ien | 19 |
| Zip Group Pllc | 19 |
| Martin & Associates Llc | 18 |
| Venable Llp | 16 |
| Canaanlaw Pc | 13 |
| The Steadman Law Firm Pllc | 12 |
| Michael R Roberts | 11 |
| Law Office Of Anthony England Svl | 10 |
| Lynda Wood | 8 |
| Matthew J Bussan | 8 |
| Law Offices Of Ira D Blecker PC | 7 |
| Gregory Nordstrom | 5 |
| Hoffmann & Baron Llp | 3 |
| Law Office Of Ido Tuchman Yor | 3 |
| Oblon Mcclelland Maier & Neustadt Llp | 3 |
| Roy W Truelson | 3 |
| Daniel J Swirsky | 2 |
| Bierman And Muserlian | 1 |
| Caesar Rivise Pc | 1 |
| Dorius Law Pc | 1 |
| Hoffman Warnick Llc | 1 |
| Holland & Knight | 1 |
| Kunzler/Arc | 1 |
| Law Office Of Anthony England End | 1 |
| Lempia Summerfield Katz Llc | 1 |
| Macronix | 1 |
| Mollborn Patents Inc | 1 |
| Oliff Plc | 1 |
| Pou IP Law | 1 |
| Rolnik Law Firm Pc | 1 |
| Seed IP Law Group Llp | 1 |
| Servilla Whitney Llc | 1 |
| Shutts & Bowen Llp | 1 |
| Sotomayor Ip Consulting Ltd | 1 |
| Tel/Rfem | 1 |
| The Caldwell Firm Llc | 1 |
| The Roy Gross Law Firm Llc | 1 |
| Tokyo Electron US Holdings Inc | 1 |
| Van Pelt Yi & James Llp And Samsung | 1 |