European Management Review

TABLE 2

FROM:

Missing the starting gun: de alio entry order in new markets, inertia and real option capabilities

Marco S Giarratana

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Table 2. Most cited firms by patents granted to the 15 Security Software product market leaders in 1998 (stock of patents at 1999)

Figure and tables index
Firm cited Numbers of citations
IBM43
Motorola27
Compaq-HP23
Science Applications19
AT&T18
Sun Microsystems14
Matsushita13
Secure Computing13
NSA Labs11
Interdigital9
Total190
Other256

 Data source is the USPTO. We take the top 15 market leaders in SSI in 1998 according to Hoover's. We collect all the patents granted in the sample period to these market leaders. We analyse the backward citations of these patents and we see which are the firms most cited by these market leaders. Even controlling for the firms that dominate the downstream market for products in SSI, the evidence of Table 1 is confirmed: large ITC firms are the most important sources of patent knowledge spillovers.

Figure and tables index
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